dom/metrics.yaml

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 # Adding a new metric? We have docs for that!
   6 # https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html
   7
   8 ---
   9 $schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
  10 $tags:
  11   - 'Core :: DOM: Core & HTML'
  12
  13 perf:
  14   largest_contentful_paint:
  15     type: timing_distribution
  16     time_unit: millisecond
  17     description: >
  18         Time from navigation start to largest contentful paint.
  19     bugs:
  20       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939
  21     data_reviews:
  22       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939#c5
  23     notification_emails:
  24       - perf-telemetry-alerts@mozilla.com
  25     expires: never
  26     telemetry_mirror: PERF_LARGEST_CONTENTFUL_PAINT_MS
  27   largest_contentful_paint_from_response_start:
  28     type: timing_distribution
  29     time_unit: millisecond
  30     description: >
  31         Time from response start to largest contentful paint.
  32     bugs:
  33       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939
  34     data_reviews:
  35       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939#c5
  36     notification_emails:
  37       - perf-telemetry-alerts@mozilla.com
  38     expires: never
  39     telemetry_mirror: PERF_LARGEST_CONTENTFUL_PAINT_FROM_RESPONSE_START_MS
  40   page_load:
  41     type: event
  42     description: >
  43         Recorded when a top level content document has been loaded.
  44     bugs:
  45       - https://bugzilla.mozilla.org/show_bug.cgi?id=1759744
  46       - https://bugzilla.mozilla.org/show_bug.cgi?id=1799727
  47       - https://bugzilla.mozilla.org/show_bug.cgi?id=1834774
  48       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939
  49       - https://bugzilla.mozilla.org/show_bug.cgi?id=1892231
  50       - https://bugzilla.mozilla.org/show_bug.cgi?id=1923894
  51     data_reviews:
  52       - https://bugzilla.mozilla.org/show_bug.cgi?id=1759744#c5
  53       - https://bugzilla.mozilla.org/show_bug.cgi?id=1799727#c4
  54       - https://bugzilla.mozilla.org/show_bug.cgi?id=1834774#c3
  55       - https://bugzilla.mozilla.org/show_bug.cgi?id=1862939#c5
  56       - https://bugzilla.mozilla.org/show_bug.cgi?id=1892231#c3
  57     notification_emails:
  58       - perf-telemetry-alerts@mozilla.com
  59       - dpalmeiro@mozilla.com
  60     expires: never
  61     extra_keys:
  62       load_time:
  63         description:
  64           "Time between loadEventStart and navigationStart, in ms."
  65         type: quantity
  66         unit: ms
  67       dns_lookup_time:
  68         description:
  69           "Time taken to perform dns lookup of the top level document, in ms."
  70         type: quantity
  71         unit: ms
  72       time_to_request_start:
  73         description:
  74           "Time between requestStart and navigationStart, in ms."
  75         type: quantity
  76         unit: ms
  77       response_time:
  78         description:
  79           "Time between responseStart and navigationStart, in ms."
  80         type: quantity
  81         unit: ms
  82       fcp_time:
  83         description:
  84           "Time between firstContentfulPaint and navigationStart, in ms."
  85         type: quantity
  86         unit: ms
  87       lcp_time:
  88         description:
  89           "Time between largestContentfulPaint and navigationStart, at the point of onLoad firing, in ms. This may differ from the final LCP value as reported through the LCP histogram."
  90         type: quantity
  91         unit: ms
  92       js_exec_time:
  93         description:
  94           "Time spent executing JS during page load, in ms."
  95         type: quantity
  96         unit: ms
  97       redirect_time:
  98         type: quantity
  99         description:
 100           "Time spent in redirections for the top level document."
 101         unit: ms
 102       redirect_count:
 103         description:
 104           "Number of redirections for the top level document."
 105         type: quantity
 106         unit: integer
 107       load_type:
 108         description:
 109           "One of normal,reload,stop,link,history,error or other."
 110         type: string
 111       same_origin_nav:
 112         description:
 113           "If true, a normal navigation was performed on the same origin."
 114         type: boolean
 115       using_webdriver:
 116         description:
 117           "If true, a webdriver is running on the client."
 118         type: boolean
 119       http_ver:
 120         description:
 121           "Version of HTTP protocol used."
 122         type: quantity
 123         unit: integer
 124       trr_domain:
 125         description:
 126           "TRR domain used."
 127         type: string
 128       features:
 129         description:
 130           "Bitfield of features in use within this document:
 131             1 - fetchpriority applied to images"
 132         type: quantity
 133         unit: integer
 134     send_in_pings:
 135       - pageload
 136
 137 performance.pageload:
 138   load_time:
 139     type: timing_distribution
 140     time_unit: millisecond
 141     telemetry_mirror: PERF_PAGE_LOAD_TIME_MS
 142     description: >
 143       Time in milliseconds from navigationStart to loadEventStart
 144       for the foreground http or https root content document.
 145       (Migrated from the geckoview metric of the same name).
 146     bugs:
 147       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729
 148       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 149     data_reviews:
 150       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729#c7
 151     notification_emails:
 152       - dpalmeiro@mozilla.com
 153       - perf-telemetry-alerts@mozilla.com
 154     expires: never
 155
 156   load_time_responsestart:
 157     type: timing_distribution
 158     time_unit: millisecond
 159     telemetry_mirror: PERF_PAGE_LOAD_TIME_FROM_RESPONSESTART_MS
 160     description: >
 161       Time in milliseconds from responseStart to loadEventStart
 162       for the foreground http or https root content document.
 163       (Migrated from the geckoview metric of the same name).
 164     bugs:
 165       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729
 166       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 167     data_reviews:
 168       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729#c7
 169     notification_emails:
 170       - dpalmeiro@mozilla.com
 171       - perf-telemetry-alerts@mozilla.com
 172     expires: never
 173
 174   fcp:
 175     type: timing_distribution
 176     time_unit: millisecond
 177     telemetry_mirror: PERF_FIRST_CONTENTFUL_PAINT_MS
 178     description: >
 179       The time between navigationStart and the first contentful paint
 180       of a foreground http or https root content document, in
 181       milliseconds. The contentful paint timestamp is taken during
 182       display list building and does not include rasterization or
 183       compositing of that paint.
 184       (Migrated from the geckoview metric of the same name).
 185     bugs:
 186       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729
 187       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 188     data_reviews:
 189       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729#c7
 190     notification_emails:
 191       - dpalmeiro@mozilla.com
 192       - perf-telemetry-alerts@mozilla.com
 193     expires: never
 194
 195   fcp_responsestart:
 196     type: timing_distribution
 197     time_unit: millisecond
 198     telemetry_mirror: PERF_FIRST_CONTENTFUL_PAINT_FROM_RESPONSESTART_MS
 199     description: >
 200       The time between responseStart and the first contentful paint
 201       of a foreground http or https root content document, in
 202       milliseconds. The contentful paint timestamp is taken during
 203       display list building and does not include rasterization or
 204       compositing of that paint.
 205       (Migrated from the geckoview metric of the same name).
 206     bugs:
 207       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729
 208       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 209     data_reviews:
 210       - https://bugzilla.mozilla.org/show_bug.cgi?id=1671729#c7
 211     notification_emails:
 212       - dpalmeiro@mozilla.com
 213       - perf-telemetry-alerts@mozilla.com
 214     expires: never
 215
 216   http3_fcp_http3: &http3_fcp_http3
 217     type: timing_distribution
 218     time_unit: millisecond
 219     description: >
 220         The time between navigationStart and the first contentful paint of
 221         a foreground http or https root content document, in milliseconds.
 222         The contentful paint timestamp is taken during display list building
 223         and does not include rasterization or compositing of that paint.
 224         This is collected only on page load where the main document uses or suppports HTTP3.
 225     bugs:
 226       - https://bugzilla.mozilla.org/show_bug.cgi?id=1675503
 227       - https://bugzilla.mozilla.org/show_bug.cgi?id=1898245
 228     data_reviews:
 229       - https://bugzilla.mozilla.org/show_bug.cgi?id=1898245
 230     notification_emails:
 231       - necko@mozilla.com
 232       - perf-telemetry-alerts@mozilla.com
 233     expires: never
 234
 235   http3_fcp_supports_http3:
 236     <<: *http3_fcp_http3
 237     description: >
 238         The time between navigationStart and the first contentful paint of
 239         a foreground http or https root content document, in milliseconds.
 240         The contentful paint timestamp is taken during display list building
 241         and does not include rasterization or compositing of that paint.
 242         This is collected only on page load where the main document supports but is not using HTTP3.
 243
 244   h3p_fcp_with_priority: &h3p_fcp_with_priority
 245     type: timing_distribution
 246     time_unit: millisecond
 247     description: >
 248         The time between navigationStart and the first contentful paint of
 249         a foreground http or https root content document, in milliseconds.
 250         The contentful paint timestamp is taken during display list
 251         building and does not include rasterization or compositing of that paint.
 252         This is collected only on page load where the main document uses HTTP3.
 253         A "priority" header has been received.
 254     bugs:
 255       - https://bugzilla.mozilla.org/show_bug.cgi?id=1743965
 256       - https://bugzilla.mozilla.org/show_bug.cgi?id=1796398
 257       - https://bugzilla.mozilla.org/show_bug.cgi?id=1898245
 258     data_reviews:
 259       - https://bugzilla.mozilla.org/show_bug.cgi?id=1898245
 260     notification_emails:
 261       - necko@mozilla.com
 262       - perf-telemetry-alerts@mozilla.com
 263     expires: never
 264
 265   http3_fcp_without_priority:
 266     <<: *h3p_fcp_with_priority
 267     description: >
 268         The time between navigationStart and the first contentful paint of
 269         a foreground http or https root content document, in milliseconds.
 270         The contentful paint timestamp is taken during display list
 271         building and does not include rasterization or compositing of that paint.
 272         This is collected only on page load where the main document uses HTTP3.
 273         A "priority" header has not been received.
 274
 275 performance.time:
 276   dom_interactive:
 277     type: timing_distribution
 278     time_unit: millisecond
 279     telemetry_mirror: TIME_TO_DOM_INTERACTIVE_MS
 280     description: >
 281       Time from navigationStart to domInteractive as per the W3C
 282       Performance Timing API.
 283       (Migrated from the geckoview metric of the same name.)
 284     bugs:
 285       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 286       - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
 287       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 288       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 289     data_reviews:
 290       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 291     notification_emails:
 292       - vgosu@mozilla.com
 293       - perf-telemetry-alerts@mozilla.com
 294     expires: never
 295
 296   dom_content_loaded_start:
 297     type: timing_distribution
 298     time_unit: millisecond
 299     telemetry_mirror: TIME_TO_DOM_CONTENT_LOADED_START_MS
 300     description: >
 301       Time from navigationStart to domContentLoadedEventStart as per
 302       the W3C Performance Timing API.
 303       (Migrated from the geckoview metric of the same name.)
 304     bugs:
 305       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 306       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 307       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 308     data_reviews:
 309       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 310     notification_emails:
 311       - perf-telemetry-alerts@mozilla.com
 312       - bdekoz@mozilla.com
 313     expires: never
 314
 315   dom_content_loaded_end:
 316     type: timing_distribution
 317     time_unit: millisecond
 318     telemetry_mirror: TIME_TO_DOM_CONTENT_LOADED_END_MS
 319     description: >
 320       Time from navigationStart to domContentLoadedEventEnd as per
 321       the W3C Performance Timing API.
 322       (Migrated from the geckoview metric of the same name.)
 323     bugs:
 324       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 325       - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
 326       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 327       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 328     data_reviews:
 329       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 330     notification_emails:
 331       - vchin@mozilla.com
 332       - perf-telemetry-alerts@mozilla.com
 333     expires: never
 334
 335   dom_complete:
 336     type: timing_distribution
 337     time_unit: millisecond
 338     telemetry_mirror: TIME_TO_DOM_COMPLETE_MS
 339     description: >
 340       Time from navigationStart to domComplete as per the W3C Performance
 341       Timing API.
 342       (Migrated from the geckoview metric of the same name.)
 343     bugs:
 344       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 345       - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
 346       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 347       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 348     data_reviews:
 349       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 350     notification_emails:
 351       - vgosu@mozilla.com
 352       - perf-telemetry-alerts@mozilla.com
 353     expires: never
 354
 355   load_event_start:
 356     type: timing_distribution
 357     time_unit: millisecond
 358     telemetry_mirror: TIME_TO_LOAD_EVENT_START_MS
 359     description: >
 360       Time from navigationStart to loadEventStart as per the W3C Performance
 361       Timing API.
 362       (Migrated from the geckoview metric of the same name.)
 363     bugs:
 364       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 365       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 366       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 367     data_reviews:
 368       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 369     notification_emails:
 370       - perf-telemetry-alerts@mozilla.com
 371       - bdekoz@mozilla.com
 372     expires: never
 373
 374   load_event_end:
 375     type: timing_distribution
 376     time_unit: millisecond
 377     telemetry_mirror: TIME_TO_LOAD_EVENT_END_MS
 378     description: >
 379       Time from navigationStart to loadEventEnd as per the W3C Performance
 380       Timing API.
 381       (Migrated from the geckoview metric of the same name.)
 382     bugs:
 383       - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
 384       - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
 385       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 386       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 387     data_reviews:
 388       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 389     notification_emails:
 390       - vchin@mozilla.com
 391       - perf-telemetry-alerts@mozilla.com
 392     expires: never
 393
 394
 395 performance.page:
 396   non_blank_paint:
 397     type: timing_distribution
 398     time_unit: millisecond
 399     telemetry_mirror: TIME_TO_NON_BLANK_PAINT_MS
 400     description: >
 401       The time between navigationStart and the first non-blank paint of a
 402       foreground root content document, in milliseconds. This only records
 403       documents that were in an active docshell throughout the whole time
 404       between navigation start and non-blank paint. The non-blank paint
 405       timestamp is taken during display list building and does not include
 406       rasterization or compositing of that paint.
 407       (Migrated from the geckoview metric of the same name.)
 408     bugs:
 409       - https://bugzilla.mozilla.org/show_bug.cgi?id=1307242
 410       - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
 411       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
 412       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
 413     data_reviews:
 414       - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
 415     notification_emails:
 416       - vchin@mozilla.com
 417       - perf-telemetry-alerts@mozilla.com
 418     expires: never
 419
 420
 421 javascript.pageload:
 422   execution_time:
 423     type: timing_distribution
 424     time_unit: millisecond
 425     telemetry_mirror: JS_PAGELOAD_EXECUTION_MS
 426     description: >
 427       Time spent during page load executing Javascript in ms.
 428       (Migrated from the geckoview metric of the same name.)
 429     bugs:
 430       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 431       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 432     data_reviews:
 433       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 434     notification_emails:
 435       - dpalmeiro@mozilla.com
 436       - perf-telemetry-alerts@mozilla.com
 437     expires: never
 438
 439   delazification_time:
 440     type: timing_distribution
 441     time_unit: millisecond
 442     telemetry_mirror: JS_PAGELOAD_DELAZIFICATION_MS
 443     description: >
 444       Time spent during page load delazifying Javascript in ms.
 445       (Migrated from the geckoview metric of the same name.)
 446     bugs:
 447       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 448       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 449     data_reviews:
 450       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 451     notification_emails:
 452       - dpalmeiro@mozilla.com
 453       - perf-telemetry-alerts@mozilla.com
 454     expires: never
 455
 456   xdr_encode_time:
 457     type: timing_distribution
 458     time_unit: millisecond
 459     telemetry_mirror: JS_PAGELOAD_XDR_ENCODING_MS
 460     description: >
 461       Time spent during page load XDR encoding Javascript in ms.
 462       (Migrated from the geckoview metric of the same name.)
 463     bugs:
 464       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 465       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 466     data_reviews:
 467       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 468     notification_emails:
 469       - dpalmeiro@mozilla.com
 470       - perf-telemetry-alerts@mozilla.com
 471     expires: never
 472
 473   baseline_compile_time:
 474     type: timing_distribution
 475     time_unit: millisecond
 476     telemetry_mirror: JS_PAGELOAD_BASELINE_COMPILE_MS
 477     description: >
 478       Time spent during page load baseline compiling Javascript in ms.
 479       (Migrated from the geckoview metric of the same name.)
 480     bugs:
 481       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 482       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 483     data_reviews:
 484       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 485     notification_emails:
 486       - dpalmeiro@mozilla.com
 487       - perf-telemetry-alerts@mozilla.com
 488     expires: never
 489
 490   gc_time:
 491     type: timing_distribution
 492     time_unit: millisecond
 493     telemetry_mirror: JS_PAGELOAD_GC_MS
 494     description: >
 495       Time spent during page load in the GC in ms.
 496       (Migrated from the geckoview metric of the same name.)
 497     bugs:
 498       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 499       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 500     data_reviews:
 501       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 502     notification_emails:
 503       - dpalmeiro@mozilla.com
 504       - perf-telemetry-alerts@mozilla.com
 505     expires: never
 506
 507   parse_time:
 508     type: timing_distribution
 509     time_unit: millisecond
 510     telemetry_mirror: JS_PAGELOAD_PARSE_MS
 511     description: >
 512       Time spent during page load syntax parsing JS scripts on
 513       the main thread in ms.
 514       (Migrated from the geckoview metric of the same name.)
 515     bugs:
 516       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 517       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 518     data_reviews:
 519       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 520     notification_emails:
 521       - dpalmeiro@mozilla.com
 522       - perf-telemetry-alerts@mozilla.com
 523     expires: never
 524
 525   protect_time:
 526     type: timing_distribution
 527     time_unit: millisecond
 528     telemetry_mirror: JS_PAGELOAD_PROTECT_MS
 529     description: >
 530       Time spent during page load protecting JIT executable memory.
 531       (Migrated from the geckoview metric of the same name.)
 532     bugs:
 533       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139
 534       - https://bugzilla.mozilla.org/show_bug.cgi?id=1877843
 535     data_reviews:
 536       - https://bugzilla.mozilla.org/show_bug.cgi?id=1709139#c4
 537     notification_emails:
 538       - dpalmeiro@mozilla.com
 539       - perf-telemetry-alerts@mozilla.com
 540     expires: never
 541
 542 security:
 543   fission_principals:
 544     type: event
 545     description: >
 546       When running with Fission, we received an unexpected principal from
 547       the content process. Expected values for this telemetry event are
 548       the method names in ContentParent that received the unexpected
 549       principal.
 550       This event was generated to correspond to the Legacy Telemetry event
 551       security.fissionPrincipals#contentParent.
 552     bugs:
 553       - https://bugzil.la/1687891
 554     data_reviews:
 555       - https://bugzil.la/1687891
 556     notification_emails:
 557       - tom@mozilla.com
 558       - ckerschb@mozilla.com
 559     expires: never
 560     extra_keys:
 561       value:
 562         description: >
 563           The `value` of the event. Mirrors to the Legacy Telemetry
 564           event's `value` parameter.
 565         type: string
 566       principalType:
 567         description: >
 568           The type of principal that was received. Expected values for this field are
 569             NullPtr
 570             SystemPrincipal
 571             ExpandedPrincipal
 572             ContentPrincipal
 573             Unknown
 574
 575         type: string
 576       scheme:
 577         description: >
 578           If the principal is a ContentPrincipal, we also collect the scheme
 579         type: string
 580     telemetry_mirror: Security_Fissionprincipals_Contentparent
 581
 582 mathml:
 583   doc_count:
 584     type: counter
 585     description: >
 586       The number of documents that contained enabled MathML elements.
 587       This metric was generated to correspond to the Legacy Telemetry
 588       scalar mathml.doc_count.
 589     bugs:
 590       - https://bugzil.la/1362187
 591       - https://bugzil.la/1538985
 592       - https://bugzil.la/1590350
 593     data_reviews:
 594       - https://bugzil.la/1362187
 595       - https://bugzil.la/1538985
 596       - https://bugzil.la/1590350
 597     notification_emails:
 598       - emilio@mozilla.com
 599       - fred.wang@free.fr
 600       - dev-tech-layout@lists.mozilla.org
 601     expires: never
 602     telemetry_mirror: MATHML_DOC_COUNT
 603
 604 dom.contentprocess:
 605   build_id_mismatch:
 606     type: counter
 607     description: >
 608       The number of times the about:restartrequired page appeared due to a
 609       buildID mismatch between the parent and the content processes.
 610       This metric was generated to correspond to the Legacy Telemetry
 611       scalar dom.contentprocess.buildID_mismatch.
 612     bugs:
 613       - https://bugzil.la/1366808
 614     data_reviews:
 615       - https://bugzil.la/1366808
 616     notification_emails:
 617       - spohl@mozilla.com
 618     expires: never
 619     telemetry_mirror: DOM_CONTENTPROCESS_BUILDID_MISMATCH
 620
 621   build_id_mismatch_false_positive:
 622     type: counter
 623     description: >
 624       The number of times a process crashed early but we could verify it
 625       was not because of buildID mismatch between the parent and the
 626       content processes.
 627       This metric was generated to correspond to the Legacy Telemetry
 628       scalar dom.contentprocess.buildID_mismatch_false_positive.
 629     bugs:
 630       - https://bugzil.la/1651133
 631       - https://bugzil.la/1730045
 632       - https://bugzil.la/1754658
 633       - https://bugzil.la/1777404
 634       - https://bugzil.la/1817104
 635       - https://bugzil.la/1866197
 636       - https://bugzil.la/1928259
 637     data_reviews:
 638       - https://bugzil.la/1651133
 639       - https://bugzil.la/1730045
 640       - https://bugzil.la/1754658
 641       - https://bugzil.la/1777404
 642       - https://bugzil.la/1817104
 643       - https://bugzil.la/1866197
 644       - https://bugzil.la/1928259
 645     notification_emails:
 646       - alissy@mozilla.com
 647     expires: 150
 648     telemetry_mirror: DOM_CONTENTPROCESS_BUILDID_MISMATCH_FALSE_POSITIVE
 649
 650   os_priority_lowered:
 651     type: counter
 652     description: >
 653       The number of times a content process has had its OS priority
 654       lowered due to only containing background tabs without audible media
 655       playing.
 656       This metric was generated to correspond to the Legacy Telemetry
 657       scalar dom.contentprocess.os_priority_lowered.
 658     bugs:
 659       - https://bugzil.la/1538987
 660     data_reviews:
 661       - https://bugzil.la/1538987
 662     notification_emails:
 663       - mconley@mozilla.com
 664       - gsvelto@mozilla.com
 665     expires: never
 666     telemetry_mirror: DOM_CONTENTPROCESS_OS_PRIORITY_LOWERED
 667
 668   os_priority_raised:
 669     type: counter
 670     description: >
 671       The number of times a content process has had its OS priority raised
 672       due to containing at least one foregrounded tab, or a tab with
 673       audible media has started playing in it.
 674       This metric was generated to correspond to the Legacy Telemetry
 675       scalar dom.contentprocess.os_priority_raised.
 676     bugs:
 677       - https://bugzil.la/1538987
 678     data_reviews:
 679       - https://bugzil.la/1538987
 680     notification_emails:
 681       - mconley@mozilla.com
 682       - gsvelto@mozilla.com
 683     expires: never
 684     telemetry_mirror: DOM_CONTENTPROCESS_OS_PRIORITY_RAISED
 685
 686   os_priority_change_considered:
 687     type: counter
 688     description: >
 689       The number of times we've had the opportunity to change content
 690       process priority due to a tab switch or a tab being opened.
 691       This metric was generated to correspond to the Legacy Telemetry
 692       scalar dom.contentprocess.os_priority_change_considered.
 693     bugs:
 694       - https://bugzil.la/1538987
 695     data_reviews:
 696       - https://bugzil.la/1538987
 697     notification_emails:
 698       - mconley@mozilla.com
 699       - gsvelto@mozilla.com
 700     expires: never
 701     telemetry_mirror: DOM_CONTENTPROCESS_OS_PRIORITY_CHANGE_CONSIDERED
 702
 703 dom.parentprocess:
 704   private_window_used:
 705     type: boolean
 706     description: >
 707       Whether a private browsing window has been used in the session.
 708       This metric was generated to correspond to the Legacy Telemetry
 709       scalar dom.parentprocess.private_window_used.
 710     bugs:
 711       - https://bugzil.la/1491047
 712     data_reviews:
 713       - https://bugzil.la/1491047
 714     notification_emails:
 715       - seceng-telemetry@mozilla.com
 716       - ehsan+telemetry@mozilla.com
 717     expires: never
 718     telemetry_mirror: DOM_PARENTPROCESS_PRIVATE_WINDOW_USED
 719
 720   process_launch_errors:
 721     type: labeled_counter
 722     description: >
 723       Collect precise set of error code and calling site upon process
 724       creation failure path.
 725       This metric was generated to correspond to the Legacy Telemetry
 726       scalar dom.parentprocess.process_launch_errors.
 727     bugs:
 728       - https://bugzil.la/1819311
 729     data_reviews:
 730       - https://bugzil.la/1819311
 731     notification_emails:
 732       - alissy@mozilla.com
 733     expires: never
 734     telemetry_mirror: DOM_PARENTPROCESS_PROCESS_LAUNCH_ERRORS