Diễn đàn hỗ trợ Firefox

Hello, For about two or three days now, when I launch Firefox and try to open any website, it takes maybe one minute to load the page, then the navigation is OK on every website.

It only happens when I launch Firefox for the first time of my session. If I close it then relaunch it, it's still very swift.

I tried clear cache and remove cookies, just lost my logins lol but didn't work. I also tried with no extensions, nothing changed. Lastly I tried to set "network.captive-portal-service.enabled" to "false" in "about:config" but it didn't change anything neither.

So before I try anything else that could erase something on my profile, I'd rather ask here for some help :)

PS: running FF 153.0.4 on Debian Trixie with Mozilla repos. Only have two extensions: µblockOrigin and NoScript.

Thank you in advance!

Hi There are image display issues with Firefox. The attached image shows a screenshot comparing the same page on Glazy.org: Chrome on the left and Firefox on the right. The image appears too dark in Firefox, making it difficult to work using that browser. Is this a bug or a setting that needs adjusting? I haven't been able to find a solution. Thanks for your help.

I have albinism. Pure white backgrounds are not an annoyance – they cause physical eye pain and trigger migraines. Every time I visit support.mozilla.org or accounts.firefox.com, I am forced to endure #FFFFFF with no way to change it.

To anyone about to defend Mozilla blindly: this is about accessibility and eye pain, not brand loyalty, so do not silence me.

What Mozilla has done:

• Disabled extensions (Dark Reader, Stylus, Dark Mode) from modifying these pages – they are explicitly blocked by Mozilla's own Content Security Policy.
• Removed ui.systemUsesDarkTheme and layout.css.prefers-color-scheme.content-override from having any effect on these sites – they ignore prefers-color-scheme entirely.
• Left no about:config toggle to disable the forced light theme.

The only remaining workaround is a userContent.css hack with filter: invert(1) – which requires a visually impaired user to manually edit CSS files and restart the browser. That is not accessibility – that is hostility.

Security excuse – debunked:

• "We block extensions for security" – extensions are sandboxed. Blocking them on your own support pages is a deliberate policy choice, not a technical necessity.
• "We want a consistent brand appearance" – branding does not override accessibility. Forcing #FFFFFF on users with light sensitivity is a violation of basic inclusive design.
• "We respect prefers-color-scheme" – you do not. These two domains explicitly override it.
• "Users can just use Dark Reader" – you block it.

What I demand:

Make support.mozilla.org and accounts.firefox.com respect the system prefers-color-scheme media query. If you insist on light branding, add an official dark toggle in the site header – stored in a cookie or account preference. Stop blocking extensions from applying user‑chosen themes to your own sites. That is not security; it is control. You are a non‑profit that claims to value accessibility and user control. Your actions say otherwise. Fix these two domains. No CSS hacking should be required for basic vision safety.

ich kann Firefox nich in deutsch wiedergeben. Bei der Sprachauswahl geht immer alles auf Englich zurück. Das Problem besteht seit der Ubuntu-Version 18.04.6.was kann ich tun?

I have used Firefox since version 1.5 and have loved it and the community since. However, since finally scrapping Windows and switching completely to linux, Firefox has been frequently troublesome with random crashes. The crashes occur on any website I may be on and for seemingly no reason. It happens when I'm in the middle of browsing a page, just opened a new tab, or even when Firefox is simply open and I'm active on another open application.

Environment is as follows:

OS: Zorin OS 18 (Latest patches) (Based on Ubuntu) Mobo: Asus Crosshair VI Hero (Latest available BIOS) CPU: Ryzen 9 5900XT GPU: EVGA GeForce RTX 3080 XC Gaming (10GB) Ram: 8GBx4 G.Skill TridentZ RGB DDR4 (3200) Sys Drive: Samsung 970Evo M.2 Nvme 500GB

Firefox is installed via Flatpack through the built in app store in Zorin OS.

The crashes will sometimes be constant as well. Such as when it crashes, crash reporter comes up, then I click "Restart Firefox" and the second I see the window, it crashes again. This has been a constant problem though at random times ever since I switched back to Linux about 5 months ago.

Any help would be greatly appreciated. I don't want to have to change my primary browser from one that I am generally so happy with, and is also the browser that I recommend to everyone.

When I go to see a firefox bug such as the following, https://www.mozilla.org/en-US/security/advisories/mfsa2026-10/

There appears to be more details in https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 located at the bottom. When I try to view the details it asks me to log in. I do not see any reason I should have to log in to view the issue as I only intend to view the bug. Why does it require a login ?

Firefox popped up an offer to change the screen to dark, which I did. I don't like it, want to change it back. I went to settings but was unable to make the change.

Hello all, I have FF 152.0.6 in use on Fedora 43 xfce Qubes OS VMs. The only issue I have encountered is when I try to load the web UI for Proxmox Datacenter Manager. As soon as I log in to the web UI Firefox vanishes. I have tried this in troubleshooting mode with the same results. I can open the same web UI in a Debian 13 Qube and it works perfectly. The FF version there is v.140.13.0esr. These are simply the default versions that come with Qubes 4.3 templates. I can also access the web UI in the original Fedora Qube with Chromium browser with no crash. I have also tried a different Fedora qube with the same failure result as the original.

I can use Chromium but would prefer a streamlined experience with just one browser. I thank all of you in advance any thoughts or suggestions. I am a long time Firefox and Mozilla user.

Have a great day. SS

Hi, On previous releases of firefox I could load 8 items across the home display. After upgrading I can only get 5 items and I can't find a way to increase this. I'm a new user so maybe I'm just dumb but I would appreciate some help. linux/ubuntu/firefox desktop. mike_a

This started since Firefox 153.0 (Debian package).

When I open Firefox for the first time after a reboot, it opens my latest tab but all the other tabs on that window are lost, and they show as "ghost tabs" as seen in attached image.

No other issue, other windows are preserved properly when I Ctrl + Shift + N

Hi,

last year I deleted my paypal account. Before that I deleted all entries and connections to abonnements in paypal. A few days ago i received an e-mail from Mozilla that I should pay my VPN abonnement. I would like to do so, but after logging in, I was shown an error message: "Invalid payment information. There is a problem with your account. Manage payment method."

When I go to "Manage payment methods," no options for other payment methods appear, only a PayPal link. What should I do now?

Thank you for your help!

A couple days ago when I opened Firefox, I immediately started getting pop up messages saying I had viruses. If I clicked on REMOVE VIRUS, it tried to get me to sign up with McAfee. I cannot see my full screen due to all the pop up screens. My MS Defender virus protection is not identifying any viruses.

When viewing a PDF in Firefox the URL bar indicates the file was downloaded to a temporary folder. If I then select "Save" from the PDF toolbar; or if I right click and select "Save page as" it opens a save dialog to the location I previously saved the same category of PDF to. For example I have separate folders for invoices, if the PDF is my electricity invoice it somehow knows and opens the electricity folder. If it is a water invoice, it automatically opens the water folder.

Whilst this is indeed quite handy, I do not understand how Firefox is doing this; nor do I understand whether this may be a privacy risk in some circumstances and should therefore be configurable.

I am using Firefox on Linux Ubuntu 26.04. I normally work with multiple tabs. Then I quit Firefox with all tabs open at the point of quitting. Some times on the rare occasion there can be a forced quit due to some issues. In my settings I have configured it not to open the previous tabs. In fact I want a blank page. But whenever I reopen Firefox, it opens those tabs and tries to reload which is annoying. Some of these pages take a long time to reload, and why would I want to look at tabs which I already have read. Or if it crashes due to some website on a tab why reopen something that crashed in the place ? Can you fix this. Thanks.

Hiii, I am using Floorp 12.16.3@153.0 on Debian 13 with KDE Plasma. Since the latest update, navigation from Floorp’s Private Container no longer stays inside the container.

Steps to reproduce:

1. Open a new tab in Floorp’s Private Container. 2. Type either a URL or a search query in the address bar. 3. Press Enter or click the arrow button. 4. Instead of loading the address in the current container tab, the browser creates a new regular tab outside the container.

The new tab does not show the container indicator and uses my normal browsing cookies. However, clicking one of the shortcuts displayed on the new-tab page correctly loads the website inside the Private Container.

I have already tried the following:

• Confirmed that `browser.urlbar.openintab` is set to `false`.
• Confirmed that `browser.search.openintab` is set to `false`.
• Restarted the browser.
• Disabled Floorp Start.
• Opened `https://example.com` inside the Private Container and then entered another URL or search query in the address bar. It still opened a new regular tab.
• Tested by pressing only Enter, without Alt or any other modifier key.

Expected behavior: entering a URL or search query should navigate within the current Private Container tab.

Actual behavior: a new regular, non-container tab is created.

This previously worked correctly and appears to have started after updating to Floorp 12.16.3, based on Firefox 153. Is this related to a change in Firefox 153’s container behavior, or is it likely to be a Floorp-specific bug? Please help, I'm a huge floorp fan :(

Similar names for Connected Services make "Send to Device" on Android unable to differentiate devices. The workaround is to "send to all devices". I can change my device names but I don't know how to change the Connected Service name. Here are some:

• * * geoffrey’s Firefox on Geoffreys-q551ln-ASUS-Laptop
• * * Gwheeler’s Firefox on GWHEELER-SM
• * * Firefox on asus ASUS_AI2202
• * * Geoffrey’s Firefox on Geoffreys-iMac
• * * Firefox on samsung SM-G781V
• * * gwheeler’s Firefox on GWHEELER-LT-SM
• * * Firefox on SM-G960U1 Santa Maria, CA, United States

How can we improve this? Abbreviate Firefox to "Ff"? Use an in-line Firefox glyph? Also, I have a dualboot and run Lubuntu and Windows from the same device. I wonder how I can handle the device name to differentiate which OS I'm logged into.