Diễn đàn hỗ trợ Firefox

Graphs generated by Google Gemini Pro 2.5 do not display in Firefox. They are generated and then quickly removed from the display by something in Firefox. I am not running any adblocker software or extensions other than anything that is native to Firefox. I have tried changing about everything possible in the privacy settings and have not been able to fix it.

Here is what Gemini says it does when it generates a graph versus a AI generated picture.

Data Visualization (The "Graph") 📊

When you ask me to "graph," "plot," or "chart" data (like a drag polar), I use a Code Interpreter.

My Process: I write and execute Python code using a data visualization library (Matplotlib). This code performs calculations and generates a brand-new chart from scratch.

Why It Fails to Display: The resulting image is a piece of procedurally generated content. The way it's embedded in the page is more complex than a standard image. Aggressive ad blockers or strict browser privacy settings often mistake this type of dynamic content for a pop-up, an ad, or a tracker, and they actively block it from appearing—which is what causes the "appears and then disappears" issue you described.

Any help you can provide would be greatly appreciated. Thanks.

There are many sites that refue to load correctly. Soundcloud does not load at all and assets from Canva's stock media library only load the alt text descriptions. Both show that the culprit is the cross origin requests being blocked. I have reset Firefox to factory settings, uninstalled plugins, disabled enhanced tracking prevention, etc and tested private browsing which sometimes works but seems to be inconsistent. Any guess on why Firefox would be blocking Cross-Origin Requests? These sites have worked with Firefox in the past and work on Safari on the same Mac.

Canva: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://media-public.canva.com/KH7y4/MAEGv3KH7y4/1/tl.png. (Reason: CORS request did not succeed). Status code: (null)

Soundcloud: Failed to load ‘https://a-v2.sndcdn.com/assets/2-517dcb44.js’. A ServiceWorker passed a promise to FetchEvent.respondWith() that resolved with non-Response value ‘undefined’. service-worker.js:1:2774

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://a-v2.sndcdn.com/assets/2-517dcb44.js. (Reason: CORS request did not succeed). Status code: (null).

<script> source URI is not allowed in this document: “https://a-v2.sndcdn.com/assets/2-517dcb44.js”.

Running Firefox 141.0.2 on Mac Sequoia 15.6.

I have frequently used firefox to reach this local server until today. The server itself currently responds to pings, traceroute works. I can ssh to the server. I can access an SMB share on the server. All of these were tested after I ran across this issue. The server doesn't support HTTPS.

Today when I attempted to reach the server in Firefox. This time I got a popup (from Firefox, I presume) asking if I wanted to add this server to some sort of list. As I am still largely human, I didn't really read the popup, and just selected "No". And now I can't reach the server (from Firefox, that is).

So, how do add this server to Firefox's whatever list? The "Server not found" message is, as always, not even slightly helpful.

Thanks in advance.

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

I am trying to use a link provided by my apartment property manager. It is https://hermitagehills.loftliving.com/login When I use the link, or even type the website, on my desktop computer, using Windows 11, I cannot access the website. However, if I use any other device the website address works fine. I looked to see if I have the website blocked, but cannot find where to do that in Firefox. I know I have not blocked this website address. Can you help give me some suggestions? Thank you.

I keep trying to enter a shopping website I have used before in the past and keep getting the following: We block the use of VPNs and proxies to combat fraud We want you to have the best experience shopping with us! To continue, please disable your VPN or proxy.

Thank you for your patience! Your business is very important to us!

If settings, I have set my browser to be Startpage.com, which I have used for several years. Now, lately is seems as through Firefox is unable to locate that browser service. Is it being blocked for some reason? i have been using Firefox for a long time, and I ready appreciate their service. I know that Startpage.com a browser that is perhaps overly private, but is this wrong. I like the privacy from telemarketers.

Delete or block a website. https://thelatestnewsforpatriots.com/dananative/?cep=bOd6PrRvOWRKzKbbBJOxzG1b0QmJ6mCPBMHy_GIZ-FxI6NLIlz7ioftBfMry7snMtsIoKeO3wAhv3FwAHidZhhNWYPqafw_-5rLFOZ1lusaHcBLY_ay2dpnK3DrGfFdDocyREGZ7qsMH9d8tojcqfQAyboLHlDKVunuvFqqwVe16fMhwN04BxnHZ-NBQtI_UIvpVzFpsAhROfssVKfpqVl2C2LbXIFjitgJMv7Gbu2gK7utu3T8vgBq5eBs6N6stXoGTuiYtdixld2X513I7P-CjDlFxu6hQElDByjArn34R--7kH1Z5oNj5ViwidbCxNtKczYUXgYRRQSzmh_p7RIk-_dnqSs555sO98AWR_RpKJGfrvox7pihoGWilzK8v5nmEZGyp5yDHk6muFCcsjrME864UCOdzYJgwqjCzFyGbrnm2CQrioZt86CdzzCOaIAjle0aL_Njc9S771qAsiCXqBqLECPwvwQ6J5_5QobIx9y9GK88ESy8BLCVUlkl5zKdP7db7MPHR1WJzedEx4VaZwYD2t_5oqrNIhdBvJafhaK4o7N0TZuDjztbvM3wNvnRVO95L7ld3nUW80my_1t5v6hbus_XpnpN3rt8aqGJXz8y1BguE0t97o3A8MEqnm4me0PwgOPvx-ksTytUpKw&lptoken=17854280759215c721a0&operatingsystem=Windows&placementID=122812&siteID=24137&domainid=1205202&channel=News&subchannel=Conservative+News&mediaID=139796&keywords=&city=Tyler&browser=Firefox&cpv=0.0187625&s2sParam=8db60b26-95a2-4d91-aec5-468abb2aee76

Is some setting in my Mozilla now preventing this site from loading?

http://loc.gov/collections/dun-and-bradstreet-reference-book/?st=gallery

'bold text My updated version of firefox does not have my bookmarks, will not print all pages, will not allow to select print in color, will not display images in downloads only text.

Why do I keep getting blocked from sites like Newmax? I have to use Opera to connect with it and a few other news sites as well. I can't even be on the site and go to a story then get blocked. I currently have started using Opera now but had so many years with Firefox guess it is over with. Are you working with Democrats to block conservative news site? Certainly feels like it and done with the hassle so glad for Opera!