Komunitné fórum Firefox

Hi!

I am getting messages that I am blocking ads for many of my internet requests. I had never received these before but all of a sudden I started to get them. I have tried a number of things but nothing works.

I am running Windows 11 and do not have any Ad blockers.

Hello. I am setting up a site on Linux server using Apache as reverse proxy , with ASP.NET as application server . since installing SSL , I had few mixed content blocking that i was managed to fix using CSP directive in Apache configuration file. site has no issue with all browser except Firefox. the only issue is that in admin section , to configure a option. system will load a js file that simply a dropdown with list of options to choose from . when using Firefox , it tries to redirect that page to login page . for test , i clicked on the link i located in Developer tools , which directed me to login page , entered my credentials, and scripts loads showing the drop down box and ok button. is been 3 weeks i been looking for every solution and i have done everything .. but nothing have worked. now I am resort to having to use other browsers if i need to use that functionality in admin page. In page header file name : login , location : http://MYDOMAIN.ca/login?ReturnUrl=%2FAdmin%2FDiscountRulesCustomerRoles%2FConfigure%3FdiscountId%3D6%26_%3D1702682353293 , which are not correct . and browser such as Brave and Safari dose not show different path and file name and everything is correct. dose anyone know how to fix this .. ? i saw a solution mentioned as stated resting Firefox ,but can not find a way to reset , but i have reinstalled Firefox and constantly having this issue on this single section of the page . Thanks.

Opening PDFs automatically with Firefox and, without any changes I might make, saving them with the download function in Firefox, actually ruins the functionality and data entry function of that file. Specifically this happens with PDF files downloaded from the (not all that amusing) PDFs from the FINCEN, (US Financial Crimes Enforcement Network). I do not see why and how Firefox thinks it is allowed to change files that are simply downloaded and saved on Firefox.

In other words, it seems that Firefox strips away certain "permissions" and/or "functions" (like built-in lookup, menu or choice boxes). This means that the file so downloaded via Firefox can no longer be used to properly fill in data, or to look up and choose data items within the file. (I see many times that ANYTHING having to do with "permissions" tends to be an intractable and unsolvable problem for software makers & experts, so, if you do not know right away how to solve the problem, it will probably take you several years to figure this out.)

The PDF in question is created by a government agency. If you have ever dealt with a government agency, then you know that they act sort of like Adobe or Microsoft: "They don't respond, or they do respond & say they do not understand, and if they understand, they are either unwilling or unable to fix the problem."

If there is a switch or option within Firefox, which lets me tell Firefox "Save this file exactly like it is received, nothing added or removed!", that would be nice. I just have not found such an option yet, and it would be nice if it might get provided someday.

I will share my browser data, but I am sort of convinced that a detailed question like mine will not be addressed within that shared data.

Ive been within the past few days getting certain websites randomly popping up first with chrome and now with Firefox ...I've deleted ap0s browsing history to no avail. Even changed my VPN via McAfee please help

Hi, I recently performed a refresh/reset of my Firefox browser. Normally, this process is supposed to retain my bookmarks and browsing history. However, after the refresh, I found that my bookmarks and history files were not preserved at all. Is there any way to recover them?

Additional context: • I did not use Firefox Sync before the refresh. • There are no local backups of the places.sqlite file or the bookmarkbackups folder. • I am looking for any possible method to restore the lost bookmarks and browsing history.

Firefox hat während der Arbeit plötzlich abgebrochen, angeblich ein Update installiert - danach kam ein Fenster, wo ich neu starten oder abbrechen konnte - war allerdings eine Dauerschleife. Neu installieren will ich nicht, weil dann wieder mal alle Kennworte und Lesezeichen weg sind! Die Lösungen von Mozilla sind meistens unbrauchbar weil Firefox ja nicht startet !!!

I have used firefox for many years on Pc s and Imac recently I had an upgrade and now firefox opens half screen and I have make it full screen every time. I tried to find a simply way but failed and pressed dismiss button and now I can't reinstall. I had google password on very secure generated one and most of my passwords have vanished in Motzilla leaving three passwords. What is going on? I am 86 this month and have spent nearly two days wasted. Clearly the web is full of problems, we need simply put my screen or passwords back.

Hello Mozilla community

I’m troubleshooting a Kerberos/SPNEGO proxy auth issue and need help understanding whether this is a Firefox bug or a misconfiguration on our side.

Environment :

Client OS: Ubuntu 24.04 (GNOME session)

Firefox: 144.0

Other clients on same host: curl (works) and Chrome/Chromium (works)

Proxy (on-prem): swg.test.local:8080 (HTTP proxy performing Negotiate/Kerberos authentication)

AD / Kerberos realm: TEST.LOCAL (users), service SPN: HTTP/swg.test.local registered in AD

Domain trust: one-way trust exists between test.local and test.intra (contextual; but current test is within test.local)

Symptom :

curl --proxy http://swg.test.local:8080 --proxy-negotiate -u : http://example.com -> negotiates and sends Proxy-Authorization: Negotiate ... and request succeeds.

Chrome also performs Negotiate and the request succeeds.

Firefox never sends Proxy-Authorization: Negotiate and the proxy returns 407 Proxy Authentication Required. No prompt for credentials; negotiation does not start.

What I already validated

Kerberos TGT is present in user cache:

kinit user@test.local klist

TGT is visible and valid.

curl and Chrome negotiate successfully from the same host (so SPN, AD, keytab, realm mapping are working in general).

Firefox launched from terminal (so it inherits KRB5CCNAME) still does not negotiate.

I enabled KRB5_TRACE and launched Firefox; trace file stays empty (suggesting Firefox did not call into GSSAPI for this request).

Network capture shows proxy challenge Proxy-Authenticate: Negotiate and no corresponding Proxy-Authorization header from Firefox.

Firefox prefs checked / set (About:config values I validated/changed)

network.negotiate-auth.trusted-uris = swg.test.local,.test.local → Ensures Firefox will send Kerberos tokens to that host/domain.

network.negotiate-auth.delegation-uris = .test.local (optional)

network.auth.use-sspi = false (Linux)

network.negotiate-auth.allow-non-fqdn = false

network.automatic-ntlm-auth.trusted-uris left blank or set to .test.local

Despite network.negotiate-auth.trusted-uris containing the exact FQDN and domain, Firefox still does not attempt negotiation.

Diagnostics already captured

tcpdump pcap covering UDP/TCP 88 and proxy port 8080 (shows proxy 407 and absence of Proxy-Authorization from Firefox)

KRB5_TRACE=/tmp/krb5_trace.log for Firefox launch (no GSS calls logged)

Reproduced curl/Chrome flows that do include Proxy-Authorization: Negotiate ...

Hypothesis

Firefox is refusing to attempt Negotiate at all — likely due to either:

a preference that’s still missing or misinterpreted (trusted-uris format, wildcard/domain handling), or

a desktop-launch / environment isolation problem (GUI-launched Firefox not seeing Kerberos credentials or environment), or

a bug/regression in Firefox’s GSSAPI/SPNEGO integration on Linux (e.g., refusing to use a credentials cache inherited from the shell, or ignoring network.negotiate-auth.trusted-uris for proxy authorization specifically).

What I need from the community

Has anyone seen Firefox on Linux behave this way (curl/Chrome work, Firefox never starts Negotiate) with an on-prem proxy using Proxy-Authenticate: Negotiate?

Any additional about:config prefs or hidden flags that affect proxy SPNEGO (not site SPNEGO) that I should check? I already set network.negotiate-auth.trusted-uris.

Any differences in behavior between Firefox launched from GUI vs. launched from terminal that might cause the client not to use the Kerberos ticket cache — and reliable steps to reproduce/diagnose?

If you have a small reproducible test case or a recommended debug build/flags to capture verbose Firefox GSSAPI logs (beyond KRB5_TRACE) please share them.

If this is a known bug/regression, pointer to the bugtracker entry would be appreciated.

Thanks in advance

In Mozilla is it possible to use just 1 account to sync for multiple profiles just like the workspaces in Microsoft Edge ? or is anything similar is on development right now ?

If anyone knows about this, please do reply 🙏 Thank you!

Ich verwende Firefox als primären Browser aber nicht als einzigen, weil ich aus technischen und organisatorischen gründen auch andere Browser verwende. Ich hatte vor Monaten schon mal das Problem, dass Firefox beim Öffnen eines neuen Fensters oder auch bei Eingaben in die Such-Zeile = Adress-Zeile immer Yahoo gebracht hat. Ich habe es dann mit viel Recherchieren und Rumprobieren geschafft, dass in beiden Fällen Google kommt, was ich so haben will (Punkt). Jetzt kommt zumindest bei der Suchzeile wieder Yahoo und ich schaffs wieder auf die Schnelle nicht, das zu ändern. Versucht Firefox hier gegen meinen Willen Yahoo nerv-stehlend zu pushen? Wisst ihr, wie ich das aktuell wieder in meinem Sinne repariere? Wisst ihr, wie ich das dauerhaft verhindern kann, dass Firefox immer wieder Aktionen gegen meinen Willen setzt???

Подскажите! Почему не отображаются favicon в закладках? На первом скриншоте favicon есть на втором скриншоте когда я закладку переложил в папку favicon уже исчез!

Help! Why aren't favicons showing up in my bookmarks? The favicon is there in the first screenshot, but when I moved the bookmark to the folder in the second screenshot, the favicon was already gone!

Bonjour Je ne peux plus me connecter sur le site de la fédération française de Bridge depuis 3 jours. Alors que si je vais sur Google chrome je n'ai aucun problème?? Merci pour votre aide. Cordialement

Hello, hope you're having a nice day.

I'm encountering an issue in my web app: when typing a character with an accent (such as á, ä, etc.), the textarea clears out and becomes disabled, making it unusable for Spanish speakers. This behavior worked correctly until a few months ago. The application is built with Vaadin.

Below are the mozregression logs for this issue. The commit that first showed this behavior is a24b524f, worked fine upto 3b954f08.

2025-09-17T08:58:01.828000: INFO : Narrowed integration regression window from [8ba9b64c, a24b524f] (4 builds) to [3b954f08, a24b524f] (2 builds) (~1 steps left) 2025-09-17T08:58:01.831000: DEBUG : Starting merge handling... 2025-09-17T08:58:01.832000: DEBUG : Using url: https://hg.mozilla.org/integration/autoland/json-pushes?changeset=a24b524fe1b32a658d105df47dc723c9ec8e15d8&full=1 2025-09-17T08:58:01.832000: DEBUG : redo: attempt 1/3 2025-09-17T08:58:01.832000: DEBUG : redo: retry: calling _default_get with args: ('https://hg.mozilla.org/integration/autoland/json-pushes?changeset=a24b524fe1b32a658d105df47dc723c9ec8e15d8&full=1',), kwargs: {}, attempt #1 2025-09-17T08:58:01.833000: DEBUG : urllib3.connectionpool: Resetting dropped connection: hg.mozilla.org 2025-09-17T08:58:02.871000: DEBUG : urllib3.connectionpool: https://hg.mozilla.org:443 "GET /integration/autoland/json-pushes?changeset=a24b524fe1b32a658d105df47dc723c9ec8e15d8&full=1 HTTP/1.1" 302 0 2025-09-17T08:58:04.128000: DEBUG : urllib3.connectionpool: https://hg-edge.mozilla.org:443 "GET /integration/autoland/json-pushes?changeset=a24b524fe1b32a658d105df47dc723c9ec8e15d8&full=1 HTTP/1.1" 200 None 2025-09-17T08:58:04.133000: DEBUG : Found commit message: Bug 1941973 - Make `EditorBase::OnCompositionChange` always dispatch `input` event with a new pref r=m_kato

The reported web site in bug 1910865 sets `HTMLInputElement.value` to the latest value explicitly at every `input` event except when during a composition. When it's in a composition, it stores the latest value at `input` events during the composition and set it at `compositionend` event listener.

Currently, Gecko dispatches the events as the following order at ending a composition: 1. `beforeinput` whose `isComposing` is `true` 2. `compositionend` 3. `input` whose `isComposing` is `false`

Therefore, if user chooses the commit string from the candidate list, the commit string is not notified by `input` event before the `compositionend`.

On the other hand, Chrome dispatch the events as the following order: 1. `beforeinput` whose `isComposing` is `true` 2. `input` whose `isComposing` is `true` 3. `compositionend`

I.e., no `input` event is fired after `compositionend` and there is no `input` event whose `isComposing` is `false`. This is handled in the spec issue [1], but not yet resolved.

Perhaps, we can dispatch redundant `input` event before `compositionend` event, i.e., 1. `beforeinput` whose `isComposing` is `true` 2. `input` whose `isComposing` is `true` 3. `compositionend` 4. `input` whose `isComposing` is `false`

This breaks the pair of `beforeinput` and `input`, but I guess it's not important for web apps especially for the redundant `input` event case.

1. https://github.com/w3c/uievents/issues/202

Differential Revision: https://phabricator.services.mozilla.com/D234620

2025-09-17T08:58:04.134000: DEBUG : Did not find a branch, checking all integration branches 2025-09-17T08:58:04.134000: INFO : The bisection is done. 2025-09-17T08:58:04.134000: INFO : Stopped