Does it still happen in Troubleshoot Mode?

so after restoring my mac to factory settings this doesn't happen anymore. i restored it to factory settings for other reasons but at least its fixed now! thanks for the help tho.

i take it back @zeroknight. it is happening again. but no it doesnt seem to happen in troubleshooting mode.

If it works in Troubleshoot Mode and in regular mode with all extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) disabled, try to find which extension is causing the problem by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via one of these:

• "3-bar" menu button -> Exit (Power button)
• Windows: File -> Exit
• Mac: Firefox -> Quit Firefox
• Linux: File -> Quit

You can try to disable hardware acceleration in Firefox.

• Settings -> General -> Performance
  remove checkmark: [ ] "Use recommended performance settings"
  remove checkmark: [ ] "Use hardware acceleration when available"
• https://support.mozilla.org/en-US/kb/performance-settings

Close and restart Firefox after modifying the setting to apply changes.

• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

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

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

wdym If it works in Troubleshoot Mode and in regular mode? also it seemed to stop happening again, i guess the issue is intermittent.

If it works in Troubleshoot Mode, try disabling your extensions.