I forgot to try running Firefox in safe mode. While in safe mode it works but I can't find what's causing it. I manually disabled all the add-ons and it still didn't fix it.

Did you check the Adblock Plus filter rules?

If it works in Safe Mode and in normal mode with all extensions (Firefox/Tools > Add-ons > Extensions) disabled then try to find which extension is causing it by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: Firefox > Quit Firefox; Linux: Firefox/File > Quit)

I tried disabling each add-on individually and restarting FireFox each time and it still came up blank. It only works if I start in safe mode.

Did you disable all extensions at the same time?

You can try to disable hardware acceleration in Firefox.

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.

• https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

I disabled them one at a time restarting after each and all at once. Disabling hardware acceleration also did not fix it.

Do you have a userContent.css file in the chrome folder in the Firefox profile folder?

• http://kb.mozillazine.org/Editing_configuration

In Firefox Safe mode these changes are effective:

• all extensions are disabled (about:addons)
• default theme is used (no persona)
• userChrome.css and userContent.css are ignored (chrome folder in profile folder)
• default toolbar layout is used
• JavaScript JIT compilers are disabled
• hardware acceleration is disabled (Options > Advanced > General)

• plugins are not affected
• preferences are not affected

No. I don't even have a chrome folder.