Removing button border removes focus outline in FF · Issue #481 · necolas/normalize.css · GitHub
CodePen - Removing focus outline from buttons with accessibility in mind
Platform News: Rounded Outlines, GPU-Accelerated SVG Animations, How CSS Variables Are Resolved | CSS-Tricks - CSS-Tricks
focus-visible | CSS-Tricks - CSS-Tricks
Indicating focus without outline - Themes By Carolina
css - Google Chrome showing black border on focus state for button user agent styles - Stack Overflow
A guide to designing accessible, WCAG-compliant focus indicators – Sara Soueidan, inclusive design engineer
How to Style CSS Focus Outline
How to Style CSS Focus Outline
Don't Override CSS Outline Focus Styles
Creating a custom focus style | Zell Liew
Designing Button States – Cloud Four
Designing States for Buttons & UI Interactions | Adobe XD Ideas
34904 (The design of the focus outline on buttons/elements could be improved) – WordPress Trac
focus-visible Is Here · Matthias Ott – User Experience Designer
A guide to designing accessible, WCAG-compliant focus indicators – Sara Soueidan, inclusive design engineer
css - Remove default focus outline and change to different color - Stack Overflow
How To Design Useful and Usable Focus Indicators
html - How to remove outline on circular button when clicked - Stack Overflow
Jagged Little Pill: Issues with Rounded Buttons – Cloud Four
Styling The Good Ol' Button Element - Ahmad Shadeed
css - Remove default focus outline and change to different color - Stack Overflow
Tips for Focus Styles - Nic Chan
Designing button focus states for better usability - DEV Community 👩💻👨💻
34904 (The design of the focus outline on buttons/elements could be improved) – WordPress Trac
![Form submit buttons outline on focus [#2224567] | Drupal.org](https://www.drupal.org/files/issues/6.buttons.png "Form submit buttons outline on focus [#2224567] | Drupal.org")