IDK how many people here browse the addons for Firefox but it is amazing what is available! My favorite addon, because I keep 10-40 windows open at a time is the vertical tabs addon. What it does is instead of the tabs going across the tip they are stacked on the side of the screen (left or right). This addon is best if you are using a wide screen monitor because it is wider (obviously).
Here is a link to it:
https://addons.mozilla.org/en-US/firefox/addon/vertical-tabs/
Here is a link to it:
https://addons.mozilla.org/en-US/firefox/addon/vertical-tabs/
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