If you have upgraded the Firefox web browser to version 21, the most recent version at the time of writing, you may have noticed that it is missing the All Tabs preview feature that was included in previous versions of the browser.
It displayed a button in the web browser that you could click on to display an overlay window displaying all open tabs of the browser as thumbnail previews. It furthermore displays a search on top that you could use to quickly find a tab you wanted to open at that time.
Mozilla removed the All Tabs panel code from Firefox 21 which means that the feature is no longer available from that browser version on.
Let me show you how to fix the issue so that you can get the All Tabs preview feature back in Firefox:
To add the menu icon to Firefox do the following:
You can now display the All Tabs overlay in Firefox either with a tap on the shortcut Ctrl-Shift-Tab, or with a click on the All Tabs button that you have added to a toolbar.
The overlay stays in place until you make a selection or click on a location outside of it. A click on a tab focuses the tab in the browser right away.
If you have many tabs open, you may find the search helpful as it will filter all open tabs based on what you enter in it. So, if you enter Firefox into the search field, all matching tabs are displayed in the overlay while all others are hidden from view.
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