Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Where do I check hardware acceleration? I don't have that addon. I have AdblockPlus, Honey, Adobe Acrobat and Ecosia Search Engine Plants Trees. Ok so I've switched back to default theme. Then what?

LostInSpaceMan said

Where do I check hardware acceleration? I don't have that addon. I have AdblockPlus, Honey, Adobe Acrobat and Ecosia Search Engine Plants Trees. Ok so I've switched back to default theme. Then what?

Hello LostInSpaceMan,

Hardware acceleration is not an add-on ....

When you look at the second link cor-el provided, scroll down to the section "Turn off hardware acceleration".

Here it is : https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_turn-off-hardware-acceleration

(edit : typo)

OMG! Nevermind. I just figured out that when I hit home while on the main tab it just opens both home pages again in that tab and a new tab and doesn't seem to realize that there's already a google home page tab open so it doubles them....

Yes, sorry, the Home button loads all the pages!

A possible alternate approach is to "pin" that tab. This article has more info on that: Pinned Tabs - keep favorite websites open and just a click away.

That's much better. Thank you!