Compatible with Firefox 51+

* Support Firefox 55+ for Android as menu item.
* Firefox beta version number is different with about:support page's one, for example "57.0" (not "57.0b1"). This is intentional behavior of JavaScript API.

NEW RELEASE
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Tab Counter Icon
Shows number of open tabs as icon.

https://addons.mozilla.org/firefox/addon/tab-counter-icon/
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Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 1
• Average daily users: 69
• Rating: 4.6/5 of 5 ratings
• Created: 2017-11-09 12:25:36
• Last updated: 2022-05-05 19:07:22
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/version-icon/
• API: version-icon@magicp.jp