4 ### Browser compatibility
6 The upper bound will always be the latest stable release.
8 | Browser | Lower bound |
9 | ----------------- | ------------------------------------------------------ |
10 | Chrome | [The release from 1 year ago][Chrome-lower-bound-link] |
11 | Firefox | [Latest active ESR release][Firefox-ESR-link] |
12 | Microsoft Edge | [The release from 1 year ago][MSEdge-lower-bound-link] |
13 | Safari | [The release from 1 year ago][Safari-lower-bound-link] |
15 [Supported browsers table](https://browsersl.ist/?results#q=Chrome+%3E+0+and+last+1+year%0AEdge+%3E+0+and+last+1+year%0AFirefox+ESR%0ASafari+%3E+0+and+last+1+year)
17 [Chrome-lower-bound-link]: https://browsersl.ist/?results#q=Chrome+%3E+0+and+last+1+year
18 [Firefox-ESR-link]: https://browsersl.ist/?results#q=Firefox+ESR
19 [MSEdge-lower-bound-link]: https://browsersl.ist/?results#q=Edge+%3E+0+and+last+1+year
20 [Safari-lower-bound-link]: https://browsersl.ist/?results#q=Safari+%3E+0+and+last+1+year
24 * The [MooTools library][mootools-home] has seen [little maintenance][mootools-code-frequency] and therefore
25 its usage is [discouraged][mootools-deprecate]. \
26 New code should prefer vanilla JavaScript and resort to MooTools only if necessary. \
27 See also: [CVE-2021-20088](https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-20088)
29 [mootools-home]: https://mootools.net/
30 [mootools-code-frequency]: https://github.com/mootools/mootools-core/graphs/code-frequency
31 [mootools-deprecate]: https://github.com/mootools/mootools-core/issues/2798