| Auto Hide Sidebar | | - | | |
| Auto Private | | - | | |
| Auto Refresh | | - | | |
| Auto Reload Tab | | - | | |
| Auto Tab Discard | | - | | |
| Auto Unload Tab | | - | | |
| Auto arrange tabs | | - | | |
| Auto-reduce Tabs | | - | | |
| AutoClose Tabs | | - | | |
| AutoGroup | | - | | |
| AutoPin | | - | | |
| AutoPinTab | | - | | |
| AutoPinTabs | | - | | |
| AutoRefresh | | - | | |
| Autoclose Sidebar | | - | | |
| Autohide | | - | | 対応済 |
| Autohide Bookmarks | | - | | |
| Autohide Tabbar | | - | | |
| Autopin | | - | | |
| Awesome Search | | - | | |
| Awesome Search Extension | | - | | |
| Awesome Throbber | | - | | |
| AwesomeBar Power Tip | | - | | |
| Back Forward separate | | - | | |
| Back to Close | | - | | |
| Back to Close WE | | - | | |
| Back to Owner Tab | | - | | |
| Background Tabs | | - | | |
| Background image | | - | | |
| Backlose | | - | | |
| Backward／Forward History Dropdown | | - | | |
| Back／Forward History Tweaks (restartless) | | - | | |
| Back／forward dropmarker | | - | | |
| BarTab | | - | | |
| BarTab Heavy | | - | | |
| BarTab Lite | | - | | |
| BarTab Lite X | | - | | |
| Barlesque | | - | | |
| Best Reload Plus | | - | | |
| Best Sidebar Bookmars Panel | | - | | |
| Best Theme like Google Material Design Paper Theme | | - | | |
| Better URL Bar | | - | | |
| Beyond Australis | | - | | |
| Big Buttons | | - | | |
| Big New Tab Button | | - | | |
| Bigger Address Bar Font | | - | | |
| Blank New Tab | | - | | |
| Blank Private Browsing Page | | - | | |
| Bookmark Autohider | | - | | |
| Bookmark Toolbar Toggler | | - | | |
