Diễn đàn hỗ trợ Firefox

I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

I've noticed that Mozilla products (firefox, thunderbird etc) all phone home all the time, which is a violation of both my security as well as privacy policy. In the firewall one can observe persistent, periodic, repeated connections to various non-sanctioned sites and services, apparently run by Mozilla. These include, but are not limited to:

• .mozgcp.net
• .services.mozilla.net

firefox-portal-detection.com etc.

Specifically, there are persistent, periodic and repeated connection attempts to (just copy/pasting from the first page of firewall report; there are many more as well as similar connection attempts from thunderbird as well): firefox-settings-attachments.cdn.mozilla.net:443 assets-prod.sumo.prod.webservices.mozgcp.net:443 content-signature-2.cdn.mozilla.net:443 push.services.mozilla.com:443 etc

These begin at the startup of the browser/mua and continue throughout the session. Given that none of the sites actually browsed have anything to do with mozilla per se, and given that various privacy-violating features such as DNS-over-HTTPS (yes, that's a not a privacy-enhancing feature but the opposite - it just shifts the surveillance point from the ISP to the DoH provider) and other similar "features" are disabled in-browser, there should be no user/browser connections attempted to mozilla servers.

Also, by setting up a local security MITM proxy in order to observe and analyze the content sent to and received from these services and configuring the browser to connect via the proxy, the browser seems to *stop* trying to connect to these services, which indicates *active* measures by the browser/mua to avoid it's browser-fingerprinting and location-revealing content from being intercepted and analyzed.

This is especially concerning as Mozilla actively brands and markets it's products as privacy-respecting, as for-user-rights and as away-from-big-tech-dominated. Consequently I perceive this as complete breach of trust. Even by just *attempting* such phone-home connections a leak of metadata occurs, identifying the IP, the browser and consequently the user and user's location, sometimes actively (such as was the case with now apparently discontinued location.services.mozilla.net). Combined with whatever content these connections carry, this constitutes a serious breach. And there seems to be no way for the user to configure the browser to stop making these connections, other than by using an external application firewall.

And to top it off, with Firefox version 155.0.1, the browser now outright refuses to connect to *any* sites at all if firefox.settings.services.mozilla.com:443, firefox-settings-attachments.cdn.mozilla.net:443, firefox-portal-detection.com:80 and content-signature-2.cdn.mozilla.net:443 are *externally* blocked, at least on that profile (which worked just fine prior to upgrade to 155.0.1), showing a spinner and waiting indefinitely (not even timing out). These are the *only* connections it even attempts, completely ignoring the actual site that it was told to connect to. So that's at least 4 privacy-violating, security-policy-violating phoning-home connection attempts and a complete disregard for user's actual, sanctioned connection request.

when i use Chrome or edge to access yahoo email I can write & edit. when using Firefox browser; I cannot write & edit/highlight/change text colours etc before sending. tried deleteing & re-installing Firefox . please help. Driving me crazy rsvp

My Firefox browser shows the built-in icon (x VPN) in the upper right of the screen. If I click on the icon it starts the process that results in successfully logging into my mozilla account and the screen prints out the following: Next: Turn on VPN

One more step to boost your browser’s privacy. Go to the open panel and turn it on.

But the screen shows no open panel! If I click on the (x VPN) again, the process starts over.

I have checked Settings > Privacy & Security and made sure that the entry "Allow Firefox to improve features, performance, and stability between updates" is checked. I have made sure that browser.ipProtection.enabled is set to true; browser.ipProtection.everOpenedPanel is set to false; and I see no entry for browser.ipProtection.openedPanelWithLocation.

I have signed out completely from the Mozilla account, restarted the browser, and logged back in to restart the process using (x VPN) but it still doesn't work.

My spell check generally doesn't work, but occasionally comes back to life, I have tried the about config, and change value to 2, I have tried uploading dictionary, and making sure check as I type is ticked, but the setting on config seems to keep reverting to 1, and I'm sure if I have successfully uploaded a dictionary, I clicked on language pack, Ironically while I'm typing this, my spell check is actively involved.

FF 154.0 will not create a backup file. Trying to create an initial backup to my D: drive (2 TB Samsung 990 Pro M.2 Gen 4 NVMe SSD with 86% free space). WIN Pro 25H2 Operating system, Intel Core i7-14700K CPU; 64 GB DDR5 - 5600 MHz Corsair Vengeance DRAM.

No matter what I do I can't get the initial backup to complete even though the D:/Restore Firefox folder was created. I consistently get this message, “Hmm, there was a problem with the backup. Please try again in a few minutes.” The message result of browser.backup.backup-debug-info is:

{"lastBackupAttempt":1787153673,"errorCode":9,"lastRunStep":13}

Weathersa.co.za recently launched a new website. There is a function to select towns for a forecast. The select function is not working on Firefox Windows. It seems that Privacy Badger may have issues with the site on Windows. If I turn all ad and track blockers off the site works correctly on Firefox Android. I cannot get it to work properly on Windows. Has anyone else has this problem, Suggestions to resolve this please

How can I stop Firefox from automatic granting sites cross-site cookie permissions (see screenshot)? The problem is that the cross-site cookie(s) granted for a site more often than not is completely unrelated to that site. This problem is very frustrating.

I have tried changing several settings in Tracking Protection but nothing has stopped Firefox from auto-granting these permissions. I have for example turned off "Fix major site issues (recommended)" but it has not changed this behavior.

Thankful for any help.

It seems the default for allowing sites to store data locally is backwards (for privacy).

You should be able to set the DEFAULT to "Allow all sites to store data locally FOR THE SESSION ONLY," and then type in the sites that you would like to allow to store data locally for more than one session (or block entirely).

Is there a way to do this? There are not many sites I would like to allow permanent local data storage, so it wouldn't be such a terrible chore to type in their URLs. The opposite is true for sites I would want to allow ONLY FOR the one SESSION - that is a HUGE chore. This appears to be a privacy & security oversight - can you fix this?

I am suddenly finding I cannot scroll a thread in Chatgpt! What changed in the last 2 days? It has been working fine for 2 years. I am on OS mojave 10.14.6 on a 2015 Model Imac.

I have two windows PCs, both running Firefox 154.0.1 (64-bit) on Windows 11 Pro. One PC has the Daily Crossword widget, the other doesn't? When I go into Manage Widgets, the Daily Crossword option is present on the first PC, but not the other? It's possible that I may have hidden the Daily Crossword widget on the second PC, but if so, how do I unhide it? The PC without the widget is connected directly via a LAN cable to my router, while the other PC is connected to the same router via a Google WiFi mesh.

I use the setting brower.search.widget.new = false to customize my search bar. Since the latest update of Firefox (Firefox 154), I noticed that spacing between search results is larger and I don't like it as much. I am hoping to revert to the previous version where the spacing is more tight and easier to navigate. The first pic is Firefox 154 and the second is a previous version (147).

I tried updating Firefox or testing for the crash in Troubleshoot Mode, but it keeps crashing every minutes or so. Here is the report ID bp-67065b07-74d6-417e-b7de-caf500260906

There is seriously something wrong with the way Firefox operates. There is nothing wrong with the following site so why am I seeing this message?

Be careful. Something doesn’t look right.

Firefox spotted a potentially serious security issue with news.sky.com. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails.

news.sky.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site. Advanced What makes the site look dangerous?

The site is set up to allow only secure connections, but there’s a problem with the site’s certificate. It’s possible that a bad actor is trying to impersonate the site. Sites use certificates issued by a certificate authority to prove they’re really who they say they are. Firefox doesn’t trust this site because its certificate isn’t valid for news.sky.com. The certificate is only valid for: . What can you do about it?

news.sky.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.

When searching for any type of URL or page on Firefox, unexpected things have been occurring. The most common action is that the Recent Browsing page opens up instead of the page I was seeking. I can get to that page by clicking the tab, but it obviously should not be happening. Sometimes, I only see a completely blank page in white or gray. Again, I can get to the page by clicking the tab. A momentary blink occurs regularly when going to a new page.

I have cleaned up any unused or unimportant extensions and add-ons, since that was suggested as one cause. So far I have not taken a suggestion to clear all cookies and cache because of all the beneficial browsing that deletes. I have also not totally deleted the Firefox app because I am not sure a reinstall of all of my bookmarks, the homescreen with my 32 preset URLs, etc. will come back.

So I am looking for advice on what steps I should take to resolve this, in order of first taking the least destructive and problematic actions. Thanks, Joe

Good afternoon

recently i tried just realise my firefox can't played HEVC streaming video like twitch etc. (1st pictures)

i check on other browser such as Chrome, Edge, etc. it's played normal i check on google all about config

like media.wmf.hevc.enabled , media.hevc.enabled , dom.media.webcodecs.h265.enabled all set to true. checking on about:support i found it's not supported (2nd screenshot)

i check on Powershell are like this :

C:\WINDOWS\system32> Get-AppxPackage | Where-Object {$_.Name -like "*HEVC*"}

Name  : Microsoft.HEVCVideoExtension Publisher  : CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US Architecture  : X64 ResourceId  : Version  : 2.5.33.0 PackageFullName  : Microsoft.HEVCVideoExtension_2.5.33.0_x64__8wekyb3d8bbwe InstallLocation  : C:\Program Files\WindowsApps\Microsoft.HEVCVideoExtension_2.5.33.0_x64__8wekyb3d8bbwe IsFramework  : False PackageFamilyName : Microsoft.HEVCVideoExtension_8wekyb3d8bbwe PublisherId  : 8wekyb3d8bbwe IsResourcePackage : False IsBundle  : False IsDevelopmentMode : False NonRemovable  : False IsPartiallyStaged : False SignatureKind  : Store Status  : Ok Capabilities  : inProcessMediaExtension,

                   uniqueAppPackageCapability

in summary it's installed and running.

i will be happy if you can guide me on how to enable it. because tbh Firefox are my daily drive

thanks before