topic Re: 157.0 is soooo slow now?! is it just me? in Discussions

157.0 is soooo slow now?! is it just me?

whiskey1337 — Wed, 30 Sep 2026 17:33:19 GMT

157.0 is soooo slow now?! is it just me?

Re: 157.0 is soooo slow now?! is it just me?

dftf — Wed, 30 Sep 2026 18:18:59 GMT

@whiskey1337 : Not having any issues here: are you seeing this on all sites, or just some?

Have you tried going to Menu > Extensions and Themes > click the cog (⚙) > Check for Updates

Also try Menu > More Tools > Task Manager and click on the CPU column to sort highest-first.
Is any particular site causing high-usage at times you find it slow?

Re: 157.0 is soooo slow now?! is it just me?

whiskey1337 — Wed, 30 Sep 2026 18:54:14 GMT

youtube mostly

Re: 157.0 is soooo slow now?! is it just me?

Bulathsinhala — Thu, 01 Oct 2026 03:53:10 GMT

The new update is extremely slow, YouTube is basically unusable. The CPU usage is moving between 100% - 49%. This update Suck. Please figure out what's happening and fix it. This is so bad I'm surprised this thing got released. hope this issu gets higher priority and get solved quickly.

Re: 157.0 is soooo slow now?! is it just me?

dftf — Thu, 01 Oct 2026 07:06:01 GMT

Try going to Menu > Extensions and Themes > click the ⚙ icon > Check for Updates
It's likely to be an extension causing it

Extensions do not usually run in a "Private" window too
Try closing all YouTube tabs currently open
Then in the Firefox menu, click "New Private Window"
Try some YouTube videos in there
If they work correctly, then in non-private mode it'll be an extension causing it

Re: 157.0 is soooo slow now?! is it just me?

dftf — Thu, 01 Oct 2026 07:09:09 GMT

Given YouTube is such a major site, I'm sure during testing this would have been noticed if it was a Firefox issue causing it

It's most-likely an extension

First go to Menu > Extensions and Themes > click the ⚙ icon > Check for Updates
Fully close all Firefox windows after, then bring up a new one
See if that resolves it

If not, make sure you've no YouTube tabs open in any Firefox window
Then in the Firefox menu, choose "New Private Window"
By-default, extensions do not run in private windows, unless you chose to allow them to
Try YouTube in that private window
If it works fine, then it's definitely an extension causing your issue normally

Re: 157.0 is soooo slow now?! is it just me?

dftf — Thu, 01 Oct 2026 08:21:12 GMT

Seeing a number of reports about this on Reddit, and here are the things people here can try:

1. Turn off the Ghostery extension for YouTube
It seems to be one of the main things people confirm caused them the issue

2. Clear the cache for YouTube
Click the shield (🛡) icon on the left of the web-address bar when you're on YouTube , then click "Clear cookies and site data" then Clear Data

3. Turn-off any custom filters if you use uBlock Origin
Click the uBO shield, then the cogs to go into the settings. On the "Filter Lists" screen, make sure you're only using the default filters, not things like "uBlock filters - Experimental". If you've subscribed to any of your own blocking-lists, try unchecking them also. Some people have said this has worked for them, but overwhelmingly Ghostery is more the issue.

Please check those things and see if YouTube is still an issue after.

Re: 157.0 is soooo slow now?! is it just me?

Bulathsinhala — Thu, 01 Oct 2026 10:58:53 GMT

Seems to be the "Ghostery extension". I de activated it and the CPU usage went down.

Re: 157.0 is soooo slow now?! is it just me?

zaneselvans — Mon, 05 Oct 2026 05:11:37 GMT

I'm finding 157.0 to be catastrophically glitchy on GitHub.com -- every time I try to interact with any UI element or type in a text box it freezes for 5-10 seconds. It's almost unusable.

Re: 157.0 is soooo slow now?! is it just me?

dftf — Mon, 05 Oct 2026 13:13:24 GMT

Try opening GitHub in a "Private Window". By-default, extensions do not run in such windows.

If you find GitHub then works fine, one of your extensions will be the cause.

First try updating them: Menu -> Extensions and Themes -> ⚙ -> Check for updates
If any get updated, fully-close all Firefox windows, then open a new one

If you still have issues, do a web search and see if anyone else is reporting an issue
on that site, and see if they mention an extension you may also use. If so, see if you
can disable it on GitHub.

There was a big issue with Ghostery causing freezing and page crashes on YouTube,
for example, which that team since fixed. So it may be a coincidence, not the fault of 157.

Re: 157.0 is soooo slow now?! is it just me?

zaneselvans — Tue, 06 Oct 2026 08:16:26 GMT

Turning off custom filters with uBlock didn't help. Turning uBlock off on GitHub entirely didn't help. I don't have Ghostery installed. No updates from any extensions yet (I have them set to auto-update).

Switching to a private window and logging into GitHub did make it stop freezing in that window.

However, I have a lot of privacy oriented extensions which I do allow to run in private windows. Going back to a non-private window and disabling all of the extensions which *don't* run in private windows had no effect.

Re: 157.0 is soooo slow now?! is it just me?

dftf — Tue, 06 Oct 2026 08:37:37 GMT

Okay, so if when you switched to a Private Window, with the extensions you have allowed to run in that window you say it "did make it stop freezing", then it must be one of your other extensions. So narrow-down which you allow in a Private Window, versus those you don't.

Then in Menu -> Extensions and Themes you can try turning off one of those extensions that only run in a normal window, and see if the freezing stops to isolate which one it is (turning an extension off isn't the same as removing it: you won't lose any settings you've setup in it).

Once you find the extension causing the issue, contact the team who makes it to report the issue (which, ironically, will probably be on GitHub, as most extensions use that for their issue trackers!)