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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.

Hello! I appreciate many niceties of the 148 update, but i'm having an issue resulting in many more tabs on Android mobile than I usually generate. When I search something and then want to sesrch the same query again using a different search engine (by selecting a different search engine from the tab bar menu) a new tab opens, leaving the query via the previous search engine open, and the current query of the current search engine in a new tab with focus. I'm aware that this behavior can be modified on desktop, but there is no such setting for android.

I would really love for this behavior to be reverted or optional, as it's made it so I need to clear out many tabs of duplicate queries (on different sesrch engines) and it makes me avoid using the built-in search engine switcher to prevent generating more tabs :( (which sucks because I have like 10+ custom searches and they're very useful!)

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?

Hello,

Not sure if there is a new bug open for this issue, but colors have been off for awhile now on Tab row on top for Firefox Android. I noticed on the new Nightly, the colors are changing for address bar and the tab row section.

Unfortunately colors are still off. Not sure if I should open a new bug for this?

I am using Pixel Tablet. I have same issue on multiple other android tablets too. (OnePlus Go). The only one without an issue is Samsung tablet I have.

Image attached of how it looks on the new Nightly.

I have a bug filed about this from quite awhile but that was for stable android. https://bugzilla.mozilla.org/show_bug.cgi?id=1971473

I'm not sure if there is a new section to follow along with the new work being done? Colors are still off.

I just switched to ff from chrome on both desktop and phone as well, and I was very pleased to discover how much ff has to offer. My question is: how do I see new news on the "News" panel which can be accessed from the home page on the right top (see pic attached). The contents are various, which is good and I understand I have to train it first to know my interests, which is not a problem. However, since installing (about a week ago) I have not seen anything new there. The pull to refresh is not working, there is no button I can press. I even thought I have to open them to sort of knock them out from the row, but that would be silly. But even after opening and reading the full article, upon returning to the panel, the same article is still there... 🤔 So, no news for me 😅 Is this a bug? Chrome got soo bloated with AI like Windows and has as many adverts like Facebook, so I looked for an alternative. Ff looked promising and after switching to Linux from Windows, it came as preinstalled browser. Ff is an old acquaintance, I have used it back in the time from since it was launched. Even then it was a better option, than Internet Explorer. We all get hijacked now and again to the new and shiny alternatives (hence the change to Cromer some time ago). But when the new and shiny is not so shiny anymore... Anyways, please help me out in where I'm missing something. The experience is very nice in any other way and extra medal for giving us the option to tailor AI features and not just cramming them down our throats. I am including a screenshot from the most recent chrome browser for Android to see the cramming and the layout. There a simple pull to refresh does the job.

Thank you for reading my rambling Kind Regards Zsanett

For years, I've been using FF on desktop (Linux), tablet (Android) and phone (Android - Samsung S24+). Sync has never been a problem until two weeks ago when FF on the phone has either refused to sync when I tapped the command, or hasn't synced for many hours or sometimes days (which is why I tried to do it manually). So, I signed out of my FF account on all 3 devices and then signed back in. The desktop computer and tablet are syncing normally, but the phone still won't sync. When I tap the 3-dot menu on the phone and then my name, it says the phone has NEVER been synced and tapping the sync command does nothing. Under "Choose what to sync", all options are checked, but greyed out. Can't change them, in other words. When I access bookmarks on the phone, it properly shows what was there before the last sync. The phone is running FF version 150.0 Build 2016155439

Help!

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

Hi all,

Firefox 140.10.2esr Windows 11

Opened Firefox this morning and it said I was using an old version of Firefox and it couldn't load my profile. I have always used the esr version.

I had a look at the compatibility.ini file under my profile and it had version 150.xx. Is that a bug with the last update?

To recover I backed up my profile then changed the compatibility version to the version of Firefox I am using. I was able to load my profile and while all my bookmarks and settings are there, my saved credentials are not. The key4.db and logins.json file are both still under my profile folder, they just don't seem to be recognised; no errors. Viewing the logins.json shows my encrypted credentials.

Does anyone know what is going on and how to resolve?

thanks

j

I am experiencing an issue where my saved Collections are not appearing on the Firefox Homepage (New Tab page), even though they clearly exist in the system.

The Issue: When I attempt to add a page to a collection, the "Select collection" overlay correctly shows my existing categories: Read Later, News, and Gemini.

The Discrepancy: When I return to the Firefox Homepage, the Collections section is completely missing. Only "Shortcuts" are visible.

Troubleshooting done: I have verified that I have active tabs saved within these collections (as seen in the attached screenshots), but the homepage remains empty below the shortcuts.

Device Specifications:

• Firefox Version: 150.0.1 (Build #2016157687)
• Build ID: 094f3362dcbcefdce34f05b355607cdce06a4ef4
• GV: 150.0.1-20260427013024
• AS: 150.0.1
• OS: Android 16

Moderator note: This question has been edited to specify values in the "Firefox version" and "Operating system" fields based on the info above.

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

Title: Please Add Native Background Play for YouTube, Facebook & All Video Platforms

Hi Firefox Android team,

One feature request that would make Firefox Android truly unbeatable:

Built-in Background Play — for all platforms.

Currently, to play YouTube or Facebook videos in the background, users have to manually switch to Desktop Mode, which is a frustrating and confusing workaround. Most users don't even know this trick exists.

Please make background play a native, one-tap feature that works automatically on any video platform — YouTube, Facebook, Instagram, and beyond — without requiring Desktop Mode or any workaround.

Brave is already competing for YouTube users. Firefox can win them all by being the only mobile browser that plays any video in the background, natively and effortlessly.

This single feature would bring thousands of users away from premium subscriptions. YouTube Premium's biggest selling point is background play. Firefox can offer that for free, for every platform, to every user.

That is a massive opportunity. Please take it.

Thank you for your time and for building a browser that still fights for the open web.

Best regards, A Firefox Android user

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.

After updating to 150 (any subversion), FF crashes on almost start - I can load a page but loading another page or a video in the page will stop loading after a while and crash within 5-10sec. No about:crashes generated. No crash if I only browse the page that's opened (except if I load extra content like videos). FF remembers if I navigate to another page before the crash, it'll open the navigated-to tab (provided it has been long enough, small pages load, big pages don't). It really looks like after loading a fixed amount of data it just stops loading and crashes, taking the full browser down with it. Note that there is likely 500+ tabs opened (even though it's never been a problem), cache was cleared and extensions deactivated.

For the first time in many many years, the beta's unstable (brillant track record for a beta)!

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.