Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox is like the plague for my computer dramatically slowing it down as soon as it opens

  • 3 replies
  • 2 have this problem
  • 3 views
  • Last reply by cor-el
  • Archived

celticstudygirl
celticstudygirl

As soon as I open firefox it automatically slows down the whole computer the only way that I can quit firefox is to force quit it. Turning off hardware acceleration doesn't help one bit either.

As soon as I open firefox it automatically slows down the whole computer the only way that I can quit firefox is to force quit it. Turning off hardware acceleration doesn't help one bit either.

All Replies (3)

cor-el
cor-el
  • Top 25 Contributor
  • Moderator

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.

celticstudygirl
celticstudygirl Question owner

That only made the problem even worse.

cor-el
cor-el
  • Top 25 Contributor
  • Moderator

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.

Create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.