Stop Messing with the Browser's Default Focus outline
CSS Quick Tip: Using Outline - Pine
アメブロ編集画面のアレンジ / 「outline」はブラウザデフォルトに | PersonWriter's Room
WebKit focus ring color in Chrome browser | DebugAH
Chromeのoutline autoをFirefoxで使いたい : (*x).b=z->a+y/c
フォーカスの「黒枠」の色を変更するには / 新しいのが良いか悪いか | PersonWriter's Room
Removing that ugly :focus ring (and keeping it too) | by David Gilbertson | HackerNoon.com | Medium
Override user agent (Chrome) default styles inside GWT - Stack Overflow
WebKit focus ring color in Chrome browser | DebugAH
What is -webkit-focus-ring-color? - Stack Overflow
What is -webkit-focus-ring-color? - Stack Overflow
WebKit focus ring color in Chrome browser | DebugAH
WebKit focus ring color in Chrome browser | DebugAH
Sass 3.2: Silent Classes - Speaker Deck
Disabling orange focus outline around Bootstrap buttons in Electron - Stack Overflow
BUG] Different Chromium -webkit-focus-ring-color for headless/headful · Issue #4810 · microsoft/playwright · GitHub
Chromium Blog: Giving users and developers more control over focus
Focus Ring on the codeeditor search for no matches · Issue #4482 · octobercms/october · GitHub
CSS - Div focus change blue border highlight color - Stack Overflow
Mimic native browser focus styles — Ionuț Colceriu
![BUG] Different Chromium -webkit-focus-ring-color for headless/headful · Issue #4810 · microsoft/playwright · GitHub](https://user-images.githubusercontent.com/52075362/102950241-d89b4a80-448f-11eb-9ce3-1cb92b63473d.png "BUG] Different Chromium -webkit-focus-ring-color for headless/headful · Issue #4810 · microsoft/playwright · GitHub")
BUG] Different Chromium -webkit-focus-ring-color for headless/headful · Issue #4810 · microsoft/playwright · GitHub
Internet Explorerの:focus擬似セレクタ - Yohei Isokawa
Focus styling in Firefox · Issue #35 · filamentgroup/select-css · GitHub
Strange black outline on all S.O and on browsers - Microsoft Community
