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.

Search Support

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

large black boxes or lines are appearing and preventing me from entering text in varous programs’ for ‘Firefox’

  • 4 cavab
  • 1 has this problem
  • 482 views
  • Last reply by cor-el

more options

large black boxes or lines are appearing and preventing me from entering text in various programs’ for ‘Firefox’

These are very large black "boxes" that also cause gmail to flick in and out from a large to a small display

large black boxes or lines are appearing and preventing me from entering text in various programs’ for ‘Firefox’ These are very large black "boxes" that also cause gmail to flick in and out from a large to a small display

Chosen solution

You can try to disable hardware acceleration in Firefox.

Close and restart Firefox after modifying the setting for changes to take effect.

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

Read this answer in context 👍 1

All Replies (4)

more options

Apps affected include Firefox, Freelancer, Gmailand, Wordpress... Pretty much every program i use.

I can't take a screen shot because the L shaped "box" disappears when i click on the screenshot app.

It is happening while i type this!

more options

It's not happening in Word/Excel etc just Apps running in firefox

more options

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

more options

Seçilmiş Həll

You can try to disable hardware acceleration in Firefox.

Close and restart Firefox after modifying the setting for changes to take effect.

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