Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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

freezes

  • 4 tontu
  • 4 am na jafe-jafe bii
  • 2 views
  • i mujjee tontu mooy FredMcD

more options

Firefox causes computer to freeze, primarily while watching videos on YouTube.

Firefox causes computer to freeze, primarily while watching videos on YouTube.

Saafara biñ tànn

FredMcD said

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

It appears an add-on was the culprit here, namely, OpenH264. Once I disabled it, the video problems went away. This was not an add-on I introduced to my browser, it comes, evidently, with V34 &V35.

Jàng tontu lii ci fi mu bokk 👍 0

All Replies (4)

more options

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

You can check for problems with current Shockwave Flash plugin versions and try this:

See also:

more options

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

more options

Saafara yiñ Tànn

FredMcD said

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

It appears an add-on was the culprit here, namely, OpenH264. Once I disabled it, the video problems went away. This was not an add-on I introduced to my browser, it comes, evidently, with V34 &V35.

more options

Good work. Well done.