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

Firefox got laggy sometimes and always when I watch videos in fullscreen mode

  • 21 replies
  • 5 have this problem
  • 93 views
  • Paskiausią atsakymą parašė Happy112

more options

I use firefox on windows 10. It got laggy sometimes on regualr website and always when I watched videos in fullscreen mode. Not really sure what is the problem.

I use firefox on windows 10. It got laggy sometimes on regualr website and always when I watched videos in fullscreen mode. Not really sure what is the problem.

All Replies (20)

more options

What's the sites so others can verify that problem?

more options

Apparently, every sites. I mostly use facebook , youtube and twitch. Sorry if i didn't write the problem clear enough ,but what I mean by laggy is when I scroll or interact with anything on the site. (Sorry for my english tho)

more options

Laggy can be also your system hardware CPU or GPU or iGPU that is slow to load graphics intensive sites as well and then translate to load issue on the Browser. So this can also be Hardware causing the lag itself and not the Browser.

more options

Well, I guess that could be the problem ;( ,but the thing is the problem I have just pop up recently. I haven't had any of this lag before. Firefox worked just fine about 1 month ago.

Modified by cooltohot56

more options

Hi,

Stab in the dark, but would you please take a look at this article :

Quick fixes if your Firefox slows down

Anything there that's helpful  ?

more options

Happy112 said

Hi, Stab in the dark, but would you please take a look at this article : Quick fixes if your Firefox slows down Anything there that's helpful  ?

Well, I've tried that. It didn't work for the first time ,but after you suggested it I did try it again and it works now somehow. Thanks!

Modified by cooltohot56

more options

I'm glad you got everything working the way you want them to -
well done  !

more options

Do you know what in particular from the article helped?

Was this a problem with hardware acceleration (graphics display driver)?

more options

cor-el said

Do you know what in particular from the article helped? Was this a problem with hardware acceleration (graphics display driver)?

I went to options > General > Scroll down to Performance > uncheck Use recommended performance settings. > Change process limit to 1 and it worked out just fine. I'm not really sure if this is gonna make my hardware work too hard or something. If someone could tell how changing the process limit will affect something that would be nice.

more options

Thanks. So it looks that your system can't handle more than one content process while playing a video in full screen mode.

more options

cor-el said

Thanks. So it looks that your system can't handle more than one content process while playing a video in full screen mode.

Oh, I forgot to mention that this problem only happen in Firefox. There isn't any lag when I watch videos in fullscreen on Google Chrome or Opera.

more options

cooltohot56 said

If someone could tell how changing the process limit will affect something that would be nice.

If your computer's system information shows more than 8 GB of RAM, you might want to try bumping up the number of content processes that Firefox uses from its default value. Additional content processes can improve performance when using multiple tabs, but will also use more memory.

more options

Happy112 said

cooltohot56 said
If someone could tell how changing the process limit will affect something that would be nice.

If your computer's system information shows more than 8 GB of RAM, you might want to try bumping up the number of content processes that Firefox uses from its default value. Additional content processes can improve performance when using multiple tabs, but will also use more memory.

Thanks

more options

Well guys, It appears that the method that I did is not working. However, it's getting bigger. Previously, like I said it only happened when I watch videos in Full Screen mode but right now it sometimes happen on every sites I go into. At first, I assume that it was only me but it happened with my brother's brand new laptop too. I'm so frustrated right now :(

more options

Is hardware acceleration enabled?

How many content processes have you set (still one)?

more options

cor-el said

Is hardware acceleration enabled? How many content processes have you set (still one)?

Yes, hardware acceleration is enabled and about the content processes I've tried to change it and it's still laggy

(Just want you to know if I'm too problematic I'm really sorry)

more options

No worry.

So the number of content is one?

Does toggling Safe Mode off make a difference?


Note that multiple content processes are merely to prevent crashes happening in one tab affecting other tabs that run in a different content process or taking the whole Firefox browser down in case multi-process is disabled. So you should see it as a safety feature. There is always an overhead involved with multiple processes (extra memory and CPU with more cores that can handle multiple processor threads more efficiently).

more options

cor-el said

No worry. So the number of content is one? Does toggling Safe Mode off make a difference?

Note that multiple content processes are merely to prevent crashes happening in one tab affecting other tabs that run in a different content process or taking the whole Firefox browser down in case multi-process is disabled. So you should see it as a safety feature. There is always an overhead involved with multiple processes (extra memory and CPU with more cores that can handle multiple processor threads more efficiently).

The number of content is one. How do I toggle off Safe Mode ?

Sorry for the delay tho, I'm pretty sure I did reply you already but whatever.

Modified by cooltohot56

more options

Firefox in Safe Mode - let's give it a try :

If Firefox is not running : Hold down the Shift key when starting Firefox. If Firefox is running : 3-bar menu => ' ? ' (at the bottom of the dropdown) => 'Restart with Add-ons disabled'. Then OK the restart. A small dialog should appear. Click 'Start in Safe Mode' ( not 'Refresh' !)

See : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode


If the above doesn't solve anything, then maybe you could try this :

Type in the address bar about:config (press Enter) (promise to be careful, if asked)

Type in the search bar webgl

and look for the preference :

webgl.disabled

And set its value to true

Then close and restart Firefox.

Remember to change its value back, if this doesn't solve the problem.

more options

Happy112 said

Firefox in Safe Mode - let's give it a try : If Firefox is not running : Hold down the Shift key when starting Firefox. If Firefox is running : 3-bar menu => ' ? ' (at the bottom of the dropdown) => 'Restart with Add-ons disabled'. Then OK the restart. A small dialog should appear. Click 'Start in Safe Mode' ( not 'Refresh' !) See : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

If the above doesn't solve anything, then maybe you could try this :

Type in the address bar about:config (press Enter) (promise to be careful, if asked)

Type in the search bar webgl

and look for the preference :

webgl.disabled

And set its value to true

Then close and restart Firefox.

Remember to change its value back, if this doesn't solve the problem.

Neither of them solve it. feelsbadman

  1. 1
  2. 2