Remove legacy browser-support CSS - #1137
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Everything here is unconditionally true for Firefox ESR, Safari 15.6+, and evergreen browsers, so the feature-query gates and legacy prefixes around it are dead weight. - Unwrapped @supports - Removed the _reset.scss which made HTML5 elements display:block (except summary which would revert to display: list-item) - Removed the &::-ms-expand selector in the Select form reset. - Replaced -webkit-appearance with the standard unprefixed appearance - Re-enabled property-no-vendor-prefix and value-no-vendor-prefix in .stylelintrc.json - appearance: button changed to appearance: auto - Removed "in IE"/"in Edge and IE" references and replaced them with comments explaining we're stuck with them.
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There are some details polyfill related styles that are left in https://github.com/mozilla/protocol/blob/2976625806a7ea026ff49a61d0b257dafba25d03/assets/sass/protocol/base/elements/_details.scss
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Description
Removes some vendor prefixes. Unwraps some @supports declarations. Updates comments that are IE specific to explain they're legacy parts of the reset.
I have documented this change in the design system.I have recorded this change in(covered by existing messages)CHANGELOG.md.Issue
#1135
Testing