Many experienced Windows users have moved the Windows Taskbar from the bottom to the side of the desktop.
This offers several advantages, especially on widescreen monitors, as you can display more open programs at the same time, and save horizontal space which more often than not is premium space.
Most Internet users are so accustomed to displaying tabs horizontally that only a few discover options to display tabs on the side as well. It offers the same benefits as moving the Windows taskbar to the side of the desktop, especially if the Firefox window is wide enough to display the tabs on the side and the website in question without forcing you to scroll left and right.
One of the Firefox add-ons that can move the tabs from the top to the side is the excellent Tree Style Tab add-on which comes with dozens of configuration options.
The add-on moves all open tabs to the left side of the web browser by default with the option to move the tab bar to the right, bottom or top as well if that is preferred. The add-on comes with several visual themes to change the appearance of tabs in the sidebar and extensive preferences.
More important than that are advanced configuration options that change how and where tabs are opened. Child pages of a website already open are opened beneath that tab by default which is useful as it links these pages together. It is furthermore possible to hide child pages automatically if the main page is not active. This saves time but impacts your overview of open tabs in the browser.
You may also notice that child pages are indented so that it is easier to spot them and their parent.
The Tab Operations preference allows you to fine tune how and where new tabs are created and how tabs are opened in the web browser.
It is for example possible to add new tabs as a child of the active tab even if domain names do not match.
It is possible to configure the add-on to work exactly as you want it to. Hiding tabs is for example a very useful feature for users who work with dozens of tabs. Users who rarely open more than ten tabs on the other hand may not find it beneficial at all.
Here is a quick overview of other features:
Tree Style Tab is a unique extension for Firefox. It adds a feature to the browser that no other browser (popular ones that is) offers currently.
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