VisualEditor/Target browser matrix

The unofficial rule for Wikimedia's browser support is that we try to support reading'' (and not necessarily other functions) for all browsers used by at least 0.1% of page hits based on the WikiStats data. However, VE is complex and requires some specific advanced browser features (most specifically, ContentEditable support, but also very wide JavaScript support), which limits the platforms we can support either technically (indicated by being struck through) or resource-wise (indicated with a ).''

As of May 2015, the blacklist is currently defined as: Microsoft Internet Explorer 9 and below; below Android 3; Firefox 14 and below; Safari 6 and below; below Opera 12; all Blackberry; all Silk. The whitelist is currently defined as:  Firefox 15 and up; Iceweasel 10 and up; Safari 7 and up; Chrome 19 and up; Opera 15 and up. Browsers not on either list (such as Internet Explorer 10 and 11) will receive a warning.

Notes:
 * Android – 4.0+ (no current automated testing): Android before v. 3.0 does not support ContentEditable, so we will have to fall back to wikitext editing.
 * Chrome – 19.0+; 29.0+ actively tested: Chrome has auto-update (but rapid version increases); VE team roughly intend to actively support only the current, soon-to-be-current, and two immediately previous versions, though we intend for all versions at 19.0 and above to work without issue (including forks like Iceweasel). Versions below 19.0 may be possible to support if necessary.
 * Firefox – 15.0+; 23.0+ actively tested: Firefox has auto-update (but rapid version increases); VE team roughly intend to actively support only the current, soon-to-be-current, and two immediately previous versions, though we intend for all versions at 15.0 and above to work without issue (including forks like Iceweasel). There are some technical issues that prevent Firefox 10.0 to 14.0 from being removed from the blacklist; these are solvable if necessary (see bug). Versions below 10.0 lack necessary technological support. Firefox ESR is supported only if the underlying version is supported, so Firefox ESR 10 is not currently supported, but Firefox ESR 17 and Firefox ESR 24 should work fine.
 * Mozilla – No support: Mozilla itself is an ancient browser, and cannot be supported due to technological issues. Lots of browsers are mis-reported as Mozilla but are in fact much more modern, and should work without issue.
 * MSIE (Internet Explorer) – 9.0+ (currently suspended): Each version of MSIE is differently broken, and adds significant support burden. However, as it is still relatively popular, the team intend to support 9.0 and upwards. Versions below 9.0 suffer from a a variety of missing key technologies which mean they cannot be made to work with VisualEditor.
 * Opera – 12.00+ (no current automated testing): Opera Desktop (from 12.00 onwards) is a cousin of Chrome, and should work without incident. Opera Mini does not support contentEditable, so VisualEditor can never work on it.
 * Safari – 5.0+ (no current automated testing): Safari Desktop is a cousin of Chrome, and should work without incident. Safari on iOS (iPad/iPhone/iPod) has very wide-spread auto-update; VE team roughly intend to actively support only the current, soon-to-be-current, and immediately previous version only.