Firefox puts a white box on the bottom of the page. How do I remove?
This may have started since recent Windows 10 update. Note white box at bottom. Also sending extensions.
Here are screenshots.
All Replies (4)
Does it happen when Firefox is in Safe Mode?
Please tell me exact process to get to Safe Mode. I just rebooted and I'm in Chrome and it's not here
I'm just guessing it appears only when I'm using the Firefox browser, but not sure. Only rebooting seems to remove it. Not sure if it only is triggered by using Firefox, as I'm able to use other browser (Chrome) for a long time without it.
When I close all other tabs/apps, white box remains. Once the box appears, it remains on screen in lower right until I reboot.
Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css 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 Troubleshoot Mode start window
- https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
- https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems
If it works in Troubleshoot Mode and in normal mode with all extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) disabled then 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 do a malware scan just to be sure.