Firefox Community Forum

We have an asp.net Blazor SPA (server side Blazor) that dynamically generates components within the page. Over time, there is a very large RAM leak under document-shared that climbs until the windows are closed.

We have tried various firefox configurations to try and either disable this shared storage as well as limit but with no luck. THe memory allocation is in GB of RAM space and cannot be limited or reduced until the window itself is closed/restarted.

Research online indicates this can happen due to colocated stylesheets and how firefox wants to cache styles aggressively. Adjustments to move stylesheets does not appear to help.

What configurations can I use to help prevent/reduce this high RAM usage? This does not occur in Chrome or Edge, I cannot replicate this well under FireFox for Windows.

Good day everybody, I am new to Firefox. I have MacBookAir 11. I added the Ecosia extension since it's my main search engine. I noticed there aren't ads popping up for Ecosia. That is how Ecosia makes money for it's sustainability projects, so, as nice as it is to not see ads, I would like them to show up for my Ecosia searches. I understand you can make an Enhanced Tracking Protection exception (and I did), but where can I find a place to make exceptions for whatever AdBlock software came already integrated to Firefox? I am liking Firefox so far. Thank you everybody. Miran.

In this version of Firefox 152 for windows I'm currently unable to remove search related to google, ebay, perplexity and bing.

Please return possibility to remove those completely!

I don't want my browser to have anything to do with those listed above. I have had it removed in previous versions. Why did you add it to browser again?! Why don't you allow to remove it anymore?!

The built in VPN worked great for me for a couple of months, but now whenever I try to turn it on, it starts with the "Get Started" screen, which takes me to a page to confirm my account. When I press continue the VPN button just goes back to the "Get Started" screen & the loop repeats. I've tried signing out & refreshing my Firefox installation but I keep getting the same result. Before it started doing this the button to turn on the VPN was appearing but would not react to clicks.

I started using the new sidebar, but now when I type in the History search field, it doesn't recognize anything, even the most recent pages that are listed when I bring up History. I type any letter of the alphabet, and I get "No results for 'x'".

If I click on the three horizontal bars that say, "Open application menu", when I hover over it, I can click on History and then Search history, which puts my cursor in the address bar, and it brings up anything I type in just fine. How do I fix the sidebar?

Content Security policy blocks essential scripts no matter what I do.

It's new Firefox installation, Troubleshoot mode, Enhanced tracking disabled, I'm not on VPN, can log into X.com in another browser just fine.

It's the reason #1 I don't use Firefox. I thought the issue would be fixed but it has been like this for long time.

Yet whatever I do, whatever I turn off this pops up:

Content-Security-Policy: The page’s settings blocked the loading of a resource (default-src) at https://abs.twimg.com/responsive-web/client-web/bundle.Conversation.721fc4aa.js because it violates the following directive: “default-src 'self'”

The screenshot is from Zen, but it uses Firefox and the issue is the same in Firefox.

The topic chosen is the best of a 'bad' list.

I have started using the Multiple Profiles feature in Firefox.

If I have two instances of Firefox running and I open the Bookmark Manager in both instances there is no obvious indicator as to which Firefox instance a Bookmark Manager belongs.

I have currently created a folder within the Bookmarks Menu folder that has been given the same name as the profile. Is there a better way?

Сегодня 23.04.2026, я открываю браузер и вижу, что моя строка и ярлыки находятся сверху, а не в центре(1 скриншот). Вчера 22.04.2026 все было хорошо, я покажу на 2 скрине как это должно выглядеть. Хочу заметить что у меня включена функция Handoff и она мне удобна, но мне неприятно видеть блок с ярлыками и строкой не по центру. Я использую тему ffultima, скажу еще раз, вчера все было нормально. Версия фаерфаокса у меня - firefox developer edition

When I select a line of text, normally it would get deleted/overwritten when typing a new line of text, but when I select text in Firefox and begin typing again, it simply deletes the first word in the selection and keeps the rest. Is there a setting to have ALL text selected deleted/overwritten when new text is entered? Selecting one word overwrites the whole word but when an entire line to be deleted is selected, only the first word is deleted and typing begins where that word ends.

helloooo

i am experiencing an issue with firefox where backup (Firefox Backup) is not working since version 148.0

problem: - when I try to create a backup, i get the error: “Hmm, there was a problem with the backup. Please try again in a few minutes.”

what I have already tried: - enabled and disabled backup password - changed the backup folder/location - cleared browser cache - tested across multiple updates (issue persists)

- backup is enabled, but I cannot create one - the error occurs every time - restarting the browser and system did not help

The question has been edited after doing further testing on the issue.

During the last week or so I have encountered the issue that one or more of my Firefox profiles keep resetting after every update.

I noticed there's couple of threads with similar issues already but the generic profile restore instructions are not helping at all since it seems that Firefox is actually wiping some files. I'm not currently sure what causes the files to be wiped, but it's either related to rebooting the PC or starting / closing Firefox. The file deletion also doesn't always hit the same profile either.

I'm running Firefox 150.0.1 for Arch on CachyOS.

I did a clean reinstall of Firefox. After the install I created 2 new accounts in addition to the one that's pre-created on install. All of the profiles work as expected at this point.

The profiles seem to have files in three places

• $HOME/.cache/mozilla/firefox
• $HOME/.config/mozilla/firefox
• /run/user/1000/psd/

The issue seems to be that after a reboot the files under /run/user/1000/psd/ are missing. Both of the other locations seemingly are unchanged but under $HOME/.config/mozilla/firefox the linked files claim no target in /run/user/1000/psd/ is found.

When looking at the missing files, it seems that in total 6 folders have been wiped at the time of testing. All of the wiped directories were ending as ".Profile 1" or ".default-release". Directories ending with ".Profile 2" or ".default" were still there. At this point I'm not sure what is causing this but it seems to explain why the profile is inaccessible.

Manually restoring the files under /psd/ seems to fix the missing profiles completely.

I saw the update that you added vpn to firefox, but I can't use it. It doesn't show up in the toolbar anywhere and there are no vpn options anywhere in settings. When I try and create a second profile THEN I get the vpn option but when I click on it it says that I can only use it with the original profile.

I’ve been experiencing an issue where dragging a URL or text from Notepad++ into Firefox causes the text to be removed from Notepad++. It behaves like Firefox is requesting a MOVE operation instead of a COPY. This only happens with Firefox, dragging the same text into Vivaldi, Chrome, Edge, etc. does not delete the text.

Here’s everything I’ve already tried:

1. Verified it’s not a Notepad++ setting Disabled “Multi‑Editing” in Notepad++ Restarted Notepad++ Confirmed the issue only happens with Firefox, not other browsers

2. Tested Firefox Safe/Troubleshoot Mode Launched Firefox in Troubleshoot Mode (no extensions, no themes, default settings) The issue still happens there, so it’s not caused by an extension or add‑on

3. Created a brand‑new Firefox profile Went to about:profiles Created a completely new, clean profile with no imported data Tested dragging again — the issue still happens even in a fresh profile

4. Reset and recreated drag‑related Firefox preferences I checked and/or reset the following in about:config: ui.dragThresholdX → recreated as Integer = 16 ui.dragThresholdY → recreated as Integer = 16 dom.event.clipboardevents.enabled → set to false browser.drag_out_of_frame_style → set to 0 browser.search.context.loadInBackground → false browser.tabs.searchclipboardfor.middleclick → false browser.urlbar.update1 → false widget.disable-native-drag → true Restarted Firefox after each change. None of these resolved the issue.

5. Tested modifier‑key behavior Holding CTRL while dragging does prevent the text from being deleted → This confirms Firefox is treating normal drags as MOVE instead of COPY.

6. Verified it’s Firefox‑only Dragging the same text from Notepad++ into Vivaldi, Chrome, Edge, Word, Notepad, etc. works normally Only Firefox causes the source text to be removed

I'm at a loss of what the issue can be or where to go from here or if there is no fix at the moment.

Hello All,

I'm using Firefox (149.0.2 snap) with LUbuntu 24.04.4 LTS. Because of a wrong graphic driver, I had to turn off hardware acceleration in FF.

When FF is started the Initial "Firefox - Choose User Profile" is unreadable (see attached : wrong_screen.jpg), but if I continue (click somewhere in the window) , all the opened tabs are readable.

Once in FF, if I want to select another profile from the application menu -> .. -> manage profiles, then the "Choose User Profile" window is fine (see attached : good_screen.jpg).

I tried to start FF with the "-P" option to specify wanted profile but it continues to start with the unreadable "Choose User Profile" window.

Could someone give me a solution, except finding the good hardware driver for my computer?

Thanks Bouilla.

I am the developer of FastF1, an open source Python package for downloading and analyzing Formula 1 race results, timing data and telemetry. The package is widely used in the fan community for independent analysis of results. For some advanced features, the addon requires users to authenticate with their Formula1/F1TV account. Since their services don't have an open login API, a companion addon is required to allow users to sign in using their browser and the official website.

I have just noticed that my developer account has been banned and the addon was blocked in Firefox. I have not received any email about this and don't know why exactly this decision was made. I'd like appeal this and reinstate my account and the addon, but I don't know how to proceed from here.

FastF1 and the companion addon are fully open source and intend no harm to users. https://github.com/theOehrly/Fast-F1 https://github.com/theOehrly/fastf1-companion

I hope this problem can be resolved.

First of all I've noticed that even logging in to the account management page doesn't work with my vpn on. So of course sync itself doesn't either. It works perfectly fine with it off though. Is there an IP address that I can add to split tunneling to allow only the sync/FF account manager through my vpn? Or another way I'm not aware of? I'd rather not have to allow the whole browser through my vpn if possible.

I had the hardest time downloading Mozilla Firefox on my computer and getting the correct one much less I purchased the Mozilla VPN and I really got it for my Samsung TV and I’ve tried and tried and tried to get it on there and I haven’t used it so I was wondering if I could get a refund on my MozillaI had the hardest time downloading Mozilla Firefox on my computer and getting the correct one much less I purchased the Mozilla VPN and I really got it for my Samsung TV and I’ve tried and tried and tried to get it on there and I haven’t used it so I was wondering if I could get a refund on my Mozella VPN thank you, Mark Yarbrough