Firefox Support Forum

Contrast disappears when I klick 'Login' eg. on 'https://www.elektor.de/'; other browsers are ok. AdGuard on or off makes no difference. Kind Regards [removed email from public]

When I click on Profile Directory: Open Directory on the troubleshooting Information page it tries to open in kid3 instead of file manager (Dolphin file manager). Can I change this behaviour. Also happens with Thunderbird. I am using KDE Plasma on Linux. I just can't work this one out. I would be grateful for any suggestions.

Here is a sample URL that works on Microsoft Edge (current version) and receives an error message on Firefox (115.0.2): https://www.t-mobile.com/home-internet The error received from the web site when using FF is:

Bad Request Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

FF was working with all T-Mobile pages a few months ago and now fails with this same error on most pages.

To test on Edge, I pasted the identical address that failed in FF into Edge and it worked fine so I am confident I am comparing the same web page on the two browsers.

Thanks for your help. Claude

I have multiple internal websites, which all follow the pattern of [site.one.two] which resolves fine using the internal DNS server i have configured by going to https://site.one.two and through other programs via site.one.two, and all the [one.two] suffixes are blacklisted from being resolved with DoH in firefox, but it still forces a web-search, even with searching from address bar being turned off, instead of resolving through my local DNS server (local server resolves local domain suffixes, anything else gets resolved through cloudflare DNS). I haven't found a fix in any other forums, and there are enough unique internal addresses that manually adding each and [every site.one.two] as an exception would be something i would like to avoid. Is there any way to tell firefox to resolve through DNS first for addresses or domain suffixes?

Ever since I update Firefox a month or so ago, every time I open the browser it wants to restore my last session. I've went into setting and check it to make sure I did have it on. I even turn it on, rebooted and the took it off and rebooted. Nothing seams to work. Any help?

I updated Firefox on July 1, 2023 and the dark mode stopped working. I used to be able to have all website and pages dark, I've been looking for a solution or work around with no luck. Any forum questions that I've read has all sounded like a "canned" answer with no results. The questions asked were never answered, and it's been very frustrating. I have glaucoma and have great problems looking at a white screen. Even this page is bright white and hard to read and I'm unable to change it to dark. I've been hoping to see an update solving this problem but there hasn't been one. Please send me a real resolution for this problem. Thank you

I have multiple monitors and most often have Firefox windows open on each. Lately, I've been noticing that the Desktop Window Manager process is consuming a huge amount of RAM. At the same time, consumption completely disappears with the closing of Firefox windows. Video: https://i.imgur.com/pHCa7Hh.mp4 (I left it for a while then closed Firefox windows) After a while, I noticed that already 13 GB of memory is being used by DWM. I don't know if sites affect behavior, but most often I have https://music.yandex.ru/home open

OS: Windows 11 (Microsoft Windows [Version 10.0.22621.1928]). Firefox: 115.0.1 (64-bit) Screen setup: 1 - 3840 x 2560 with 200% scale, 2 - 1920 x 1080 with 100% scale.

just updated to 115.0.1 on the Mac yesterday and now tradingview website isn't working - i tried adding it as an exception in EnhancedTracking and CookieSiteData like i did with ebay to get it working again but no luck with tradingview... any ideas ? thx

I have not been able to connect to www.paperbackswap.com for 2 days using Firefox. I get this message - The page isn’t redirecting properly-An error occurred during a connection to www.paperbackswap.com. This problem can sometimes be caused by disabling or refusing to accept cookies. This is a persistent problem happening every few days. I have sent messages before to PBS and Firefox with no response. I have cleared cookies and added PBS to Firefox as a site to always accept cookies. I can access the site using Chrome but I would prefer Firefox. Is there anything that can be done?

Firefox is displaying a smaller font on some websites. It only does it new windows, not in a private window and other browsers are fine.

Screenshots attached show the correct size (first attachment) and the incorrect smaller size (second attachment).

It's not windows accessibility aka ease of access, as nothing else is affected. All pages are on 100% zoom. I've gone to settings -> font -> advanced and the "Allow pages to choose their own fonts, instead of your selections above" is ticked.

Any ideas please?

Hi - Javzscript Enable, though "True", still brings up the error "Enable Javascript". I spent hours on this, but nothing useful was found. Has any one had this problem, and if so, were they able to fix it?

Best regards, Nick.

I received a message from Fire Fox that I should update. Now I have 2 Fire Fox icons and I need to know how to determine which one to delete. Then I need to know how to transfer my favorites and history to the one I keep. They both show favorites and history. I'm a rookie at this so if you can explain step by step it would help, thanks.

trying to open 3d model on this site https://teemo.gg/viewer/league-of-legends/champions/katarina/0 its start loaded model but nothing was showed in browsers based on chromium everything works fine

I try to set up Firefox Sync on Firefox on a VM on Fedora. I enter my e-mail and password. Then I get the message (after retrying): "Email resent. Add accounts@firefox.com to your contacts to ensure a smooth delivery." However, I do not get the email with the confirmation code.

My email address has this format j@xxxxx.org

My community association uses Constant Contact for its documents, notices, etc. When I get an email message from them, it often contains several links beginning with https://r20.rs6.net. When I try to access one of those links, Firefox tells me "Hmm. We’re having trouble finding that site. We can’t connect to the server at r20.rs6.net." Chrome and Edge do not give the same error - they can access the requested page. Is there some setting in Firefox that I need to change to fix this problem? Firefox has been my default browser for years, but I also like to read notices from my community association.