It looks like we have a rule removing the `text-shadow` on `textbox`: https://searchfox.org/mozilla-central/rev/4fbcfe6fecf75d7b828fbebda79a31385f7eab5f/toolkit/content/xul.css#449 But now `#urlbar` is no longer a `textbox` after bug 1513337, so I guess we could set `text-shadow: none` at https://searchfox.org/mozilla-central/rev/4fbcfe6fecf75d7b828fbebda79a31385f7eab5f/browser/themes/shared/urlbar-searchbar.inc.css#28 ?
Bug 1567141 Comment 5 Edit History
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It looks like we have a rule removing the `text-shadow` on `textbox`: https://searchfox.org/mozilla-central/rev/4fbcfe6fecf75d7b828fbebda79a31385f7eab5f/toolkit/content/xul.css#449 But now `#urlbar` is no longer a `textbox` after bug 1513337, so I guess we could set `text-shadow: none` at https://searchfox.org/mozilla-central/rev/4fbcfe6fecf75d7b828fbebda79a31385f7eab5f/browser/themes/shared/urlbar-searchbar.inc.css#28 , `#searchbar` will soon no longer use a `textbox` too in bug 1534455, so it seems like the right place to put this.