Apps similar to ApPHP Tabs include Tab Stash, which is free and open source. Other options are Tabs Outliner, Open Tabs Next to Current and Tab Tally. In total there are four Tab Managers like ApPHP Tabs for Mac, Windows, Linux and self-hosting.
Tab Stash is a no-fuss way to save and organize batches of tabs as bookmarks. Sweep your browser clean with one click of the Tab Stash icon. Your open tabs will be stashed away in your bookmarks, conveniently organized into groups.
Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
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Always open new tabs to the right of the current one(which is not the same as setting browser.tabs.insertRelatedAfterCurrent to true). You can however get the default behaviour by:
Displays how many tabs are open. The count includes tabs from all windows. Also indicates how many tabs actually have content loaded in them – for example, after restarting Firefox.
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