Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Buscar en Ayuda

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

A gray bar with code in it is appearing at the bottom of the firefox screen.

  • 7 respuestas
  • 3 tienen este problema
  • 7 visitas
  • Última respuesta de cor-el

more options

Since yesterday (2/25/14) a gray bar that displays some code is appearing at the bottom of the screen. I tried rebooting my laptop, but it doesn't go away. It takes up about an inch of space on the screen, just above the Windows bar.

Since yesterday (2/25/14) a gray bar that displays some code is appearing at the bottom of the screen. I tried rebooting my laptop, but it doesn't go away. It takes up about an inch of space on the screen, just above the Windows bar.

Solución elegida

Yes. That is likely a problem with a broken extension as posted above.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window.

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)

Leer esta respuesta en su contexto 👍 1

Todas las respuestas (7)

more options

hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here...

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

more options

Please provide a screenshot of that grey bar and that code.

https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

It is best to use a compressed image type like PNG or JPG to save the screenshot and make sure that you do not exceed a maximum file size of 1 MB.

Then use the Browse .... button below the Post a Reply text box to upload the screenshot.

more options

Here is the screenshot of the problem.

more options

Looks like a fault with Adblock Plus. See the Adblock Plus forum.

http://adblockplus.org/forum/

more options

Solución elegida

Yes. That is likely a problem with a broken extension as posted above.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window.

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)

more options

I followed the safe mode instructions above. No one add-on seemed to trigger the strange bar. However, systematically disabling all the add-ons and testing them one-by-one, and then restarting them one at a time seems to have cleared the problem. I don't know why. I seem to be running both Adblock Plus and Trueblock ... would that be a problem?

Thanks for the help.

more options

I've seen a report that Trueblock can cause this issue.