Firefox Community Forum

Greetings. I have Windows 10 Home and have used Firefox for my primary browser for many years. I recently noted that by opening Firefox and looking at my task manager it shows 14 processes running. This causes my memory usage to jump significantly from the 50's into the 70's. The performance on searches,etc. seems okay. I recently added Browser Guard and was wondering if that was the reason for the jump in memory usage. As a side note I ran an update on Onedrive and now I have a white circle with a check mark on the desktop shortcut that I use for Firefox ... Thanks to all for any assistance regarding these questions ....

Semaphore.social is a mastodon/fediverse web client. I've been using it without issue up to now and it has not updated recently.

After a few hours running the CPU usage of Firefox becomes very high (25-50%) and the about:performance shows that it is due to this tab, which shows at values from 110 to 160% or thereabouts.

I haven't noticed this before updating to Firefox 134.0 so I suspect it may be a Firefox regression.

However I cannot work out what the cause is, how to fix it, or if I should file a bug on it.

Any ideas on how I can fix this?

Hi, I'm using FF for year for development and had several problems with cached data in this time. Now, since the last update (automatic update yesterday), Firefox is caching my js for localhost and ignores nearly everything to stop it.

F5 and Ctrl+F5: no effect Enabling "Disable cache" in devtools: no effect changed about:config (no effect): browser.cache.disk.capacity 0 browser.cache.disk.enable false browser.cache.memory.enable false devtools.cache.disabled true

Only going to settings > privacy + security > Clear Data helps. But as you can imagine, that's really bad DX

I tried a FF-addon for clearing css cache, but it's outdated and doesn't work.

Is there anything I can do, to disable cache for localhost?

I don't understand why this aggressive caching problem is ignored for years and gets worse every year! Why are settings like "Disable cache" in devtools so broken? I tested other browsers and have not found the same issues. I don't want to switch browsers! I just want a cache free localhost! FF can cache the sh*t out of every webpage. But please leave localhost out of it!

All of a sudden, I get a "Not enough room to save" error message when I try to download a fill. There is plenty of room on my disk.

Also, it's not giving me the option of just opening the file.

I've been needing to use Edge to download files.

Hi, I have 32 gb of memory in my system and I'm having an issue where firefox is taking up most of it but only reporting 1 or 2 gb in task manager. Im using the windows powershell command Get-Process | Sort-Object -Descending WS | select -first 1 | select -ExpandProperty ProcessName to find whats using the most memory and its listing firefox, heres a screenshot showing the issue.

There is a similar (but not identical) topic on Mozilla Connect , and I posted there. But I did not get a response. So I am re-posting on this new topic on Mozilla Support. I have a similar problem to what was discussed on Connect. I am using Firefox 133.0.3 on Windows 10 Professional. After Firefox has been running for a while, I get a message from Windows 10 that the free space on my C:drive is low. I did a directory listing on my C-drive before and after Exiting Firefox; I saw no large files disappearing. Then I decided to do "dir c:\ /ah" to see hidden files. What I saw was that pagefile.sys decreased in size from 29,925,748,736 to 16,270,770,176. This was a decrease of 13.7 Gb. Is this normal? I have lots of windows and tabs open in Firefox. Thanks.