Diễn đàn hỗ trợ Firefox

After tinkering with about:config (shouldn't have...) the background of every page that does not specify a body background color turns the color of my theme background color.

Using the firefox color pipette says its white, but it clearly isn't.

The theme i have is dark, making any page that expects the background to be white unreadable (without DevTools -> Body -> background-color: white)

I haven't been able to find the config that fixes it.

After upgrading my 128 esr to 140 esr, some sites stopped opening. In regular versions, it has not opened for a long time. There are many such sites, for example, qwen3.app or temp-mail.io. It thinks for a long time and finally a message that the time has expired. Chromium is ok.

We have a web page we've created that is linked to by multiple other websites. For two of the sites where this is linked, Firefox (only) gives a "The Page Isn't Redirecting Properly" error. Using the exact same URL to link from other sites works fine in all browsers. Once you get the error, if you click in the URL and hit enter, the page will load fine. Any ideas? When searching that error, all the ideas I find tend to focus on the individual user's system, but this is happening for all users.

I was asked to create a new profile in order to keep using Firefox, despite never having an account. After I clicked okay, it opened the new version of Firefox, but without all the passwords, bookmarks and history of the past few years. This is really inconvenient. I have since then made an account, but the fact that I can't find any of this data anywhere has me worried that every time I update Firefox it will wipe my account.

With FF 140.0 on both WIn10 and WIn11, new tabs opened automatically then closed after less than a second. Initially I thought this was due to malware, but on inspecting the History, I found the source of this annoying behavior:

// SidebarUtil.tab.js

// This is just a placeholder file to be loaded in a temporary tab to check if a sidebar is open and how wide it is.

Is there a way to STOP this sidebar checking with its tab opening/closing without disabling Java entirely ? Is this annoying behavior really necessary in FF ?

8 out of 10 times that i try to connect to the following site:

https://www.tax.ny.gov/online/

I get the following error message:

Secure Connection Failed

An error occurred during a connection to otc.tax.ny.gov. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Now and then, I'm able to log in successfully. lately though, I'm having trouble logging in using Firefox browser.

This is becoming very frustrating. What could be the issue? What do i need to do to resolve the problem?

So i've lost access to my email on. my old mozilla accounts and upon logging in on a new device im being asked for a code to the email which i don't have access to anymore is there a way that my info can be synced to a new one. Thanks

Hello everyone,

Is there any software that allows software developers to see what the CSS they are creating is doing in real time ?

Because I can't imagine they're doing it blindly. I see some CSS files that have hundreds, possibly thousands, of lines.

If there is software that helps them see immediately what their CSS is doing, can it be used to create extensions (add-ons) for Firefox ?

Thank you for your attention.

I often use the key combination Ctrl+Alt+X in Google Docs when on different devices but it doesn't function properly when instead it brings up the AI sidebar gadget. Removing the sidebar button doesn't really help and it's annoying. So how exactly do I turn off the key combination for the sidebar?

I joined a Microsoft Teams meeting through Firefox on the web on a Linux machine. When I tried to share my entire screen, I was asked if I wanted to share the entire screen in a Firefox pop up which I said yes. Then the "you are sharing your entire screen" came up, the sharing icon was red and the "stop sharing" button was red. See attached image. This all disappeared and reverted to the default state almost instantly.

Teams has a feature to "manage what attendees see manage what attendees see" where the meeting host can preview shared content before making it live.

I am concerned that the meeting owner was able to see my entire shared screen without me even knowing it through this preview.

Can someone help? Microsoft just sends you around in circles and I can't contact Mozilla.

When I read a thread and then it shows comments I can't read them on Mozilla anymore

I went to Google Chrome and I can read them so its something with my browser

The offline package download speed is too slow and sometimes fails. I hope it can be provided separately, like interface language packs, just as Debian has separate interface language packs.

McFee is trying to sell us computer protection. We have had Firefox for several years. I am now getting an alert to Turn On Firefox. How would it get turned off, and how do I turn it on without going through Mozilla's selling site?

I know with the implementation of this new CEO, he plans to add more garbage AI to the browser we've all been using to avoid all the new AI tool crap just to steal our data and sell it to a third-party. I have been a long, dedicated user to Mozilla Firefox since I was in middle school and played games with my friends, I'm an adult now and have never particularly been interested in using Chrome or any of the hundreds of Chromium based browsers. I've always stayed dedicated to Mozilla Firefox because the browser was specifically made to be user friendly and open-source. If you take that away I won't be using Mozilla Firefox anymore, I will just move to the next open source project for a browser.

I can't wait until this AI bubble bursts so we don't have to deal with any of this garbage any longer.

Do you have a set date to when you're going to be implementing this big change so I can have a proper funeral for one of the best browsers to be taken outback and put down into the AI slop this new CEO wants it to be?

I tried to reach the following adress: https://www.itu.int/harmful-interference-to-rnss/ and I received this message on my browser: 400 Bad Request -Request Header Or Cookie Too Large

When I tried from a different browser it was accessible.

https://support.mozilla.org/en-US/questions/1491135 2/5/25, 11:25 AM

Please change the switch in your code back to normal. Its just a tiny switch! normal is=task bar context menu by right clicking on the task bar WITHOUT "title bar". Is this so hard? And why is such important thing not fixed in 7 months?