Firefox Community Forum

why does firefox blocks incoming http conection to localhost:8080 when I try to obtain a google oauth2 token using oauth2.py ?. The Google server returns the token via http to loaclhost:8080 and the port is blocked by firefox.

https://read.amazon.com/kindle-library is now not allowing me to go onto the website. I've tried talking to Amazon customer support but they can't find a problem on their end. It says:

The connection has timed out

The server at read.amazon.com is taking too long to respond.

   The site could be temporarily unavailable or too busy. Try again in a few moments.
   If you are unable to load any pages, check your computer’s network connection.
   If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.

I haven't had a problem with the website before and every other website I have tried works fine. It's just that one. I have added it to my exceptions list for add ons but it didn't fix it.

I'm trying to access my https://mypay.dfas.mil account, but, though previously all was well, now an error message tells me that you "can't connect to the server".

I have a network connection, but apparently Firefox may no longer have "permission to access to the web". I'm sure this is wrong because I can still access pretty much everything in the normal way, including other government sites, such as Social Security, using the Login.gov portal, though mypay is not listed as 'connected.'

What happened, and how do I fix it? Also, the error message says that I should "Check that Firefox has permission". How do I do that?

Mailfence.com is my email provider. I've been with them for years. Two weeks ago I am suddenly unable to connect with the website. My ISP is Comcast. My next door neighbor also uses Comcast. He can get to mailfence.com just fine. Can you please help with this issue. Comcast has declined to provide any help. Thanks.........Bob Horning

This has been a problem for me for a very long time, and I'm tired of having to use Chrome every time there's an update to Firefox.

The issue I have is that I will get the notification saying there's an update. I click the button to update now, the browser opens the auto download page and I get a not secure connection warning. The only work around I've found is to use Chrome, and sometimes I can use the "Other downloads" option.

I'm not running a VPN, or any other networking software on my pc. This is for the full program, not the Windows Store app.

Secure Connection Failed

An error occurred during a connection to download.mozilla.org. The server uses key pinning (HPKP) but no trusted certificate chain could be constructed that matches the pinset. Key pinning violations cannot be overridden.

Error code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

   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.

With Firefox 135.0 i cant reach google.com but google.se i can.

I make daily images of C: and today i managed to go back one day to 2025-02-06 but accidentally chooses 2025-01-06 and with the older version of firefox i could reach google.com

I have tried to delete cookies. DNS over HTTPS off. No proxy in connection. Add-ons off but to no avail.

When saving images from websites using the save image as feature, Firefox will freeze up and not register any mouse click or anything instead making a ding noise every time is register a mouse click. This will continue for like 30 seconds before it becomes normal then it will repeat this for every image. How can I solve this?

In Firefox, and only in Firefox, I get 'Failed to verify your identity' on these sites. I have updated MacOS and Firefox, rebooted, tried a different DNS, and disabled all of my extensions. With extensions disabled I don't get the error, but the login site won't accept my login at all. See the attached image. I can't think of anything else to try.

The font size in "Manage Bookmarks" is way too large, both in the sections list menu on the left and the list of bookmarks. I checked my userChrome.css file as well as the layout.css.devPixelsPerPx entry in about:config and there's nothing there to explain why only the "Manage Bookmarks" text is so large.

It's possible I changed a setting somewhere that's causing this. But I'm stumped re: what setting might be controlling the font size in only that UI. All other Firefox text sizes are good.

Thanks to anyone who knows where I should be looking

Firefox 134.0.1 (64-bit) Windows 10

Subject: Assistance Required for Frequent Firefox Crashes on Ubuntu

Dear Developer Team,

I am facing persistent issues with Firefox crashing on my Ubuntu PC, and the problem has been ongoing for the past 40–50 days. Despite multiple attempts at troubleshooting—including uninstalling and reinstalling Firefox, clearing all caches, and other measures—the issue remains unresolved.

I’ve noticed that Firefox works for a few days after reinstallation, but then problems begin to surface, such as a half-screen display. Eventually, after restarting the PC, the browser starts crashing again.

Could you please investigate this matter urgently and provide a resolution? Additionally, I would appreciate it if you could clarify whether this might be related to a RAM issue or some other underlying cause.

Looking forward to your assistance.

Best regards, zimmi

Is there a way to make the URL high lighting of the domain more obvious? I find that most people can barely see the highlighting and I'd like to make it obvious (bolder and red, or highlighted in yellow, for instance.)

Can this be done via userchrome.css?

Thanks,

Thane

I get the USPS informed delivery emails that show what mail is arriving daily. Whenever I click the "dashboard" link, I get:

Bad Request

Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit. If I go to the site, and click a link, the same thing happens. This doesn't happen with Chrome where links function normally. So, I think there must be a setting somewhere preventing me from accessing the links. I tried turning off "Block pop-up windows," but that had no effect.

Thanks, Ed

Ever since upgrading to Windows 11, my Firefox installation has occasionally been unable to resolve domain names of some websites. Example domains:

• apps.powerapps.com
• static.cdninstagram.com
• google.com

As I was trying to debug this, I discovered that the DNS resolution and connection timings are just over 30 seconds (see the attached image). This is highly unusual.

• The issue does not occur with other web browsers on my computer (i.e., Microsoft Edge).
• The issue has persisted across reboots.
• I have already reinstalled Firefox (and wiped the temp files and appdata profile before installing again).
• The issue does not occur with other devices on my home network.
• DNS over HTTPS has been manually disabled.
• Changing DNS resolvers in my Windows settings does not fix the issue.
• The issue is still present with a fresh, unmodified installation of Firefox.

Any help would be greatly appreciated! I love Firefox and do not want to switch to a different browser.

I am trying to access certain HTTPS websites and some of them show PR_CONNECT_RESET_ERROR in Firefox. This error is not present in Edge or Chromium.

Here's what I've tried (none of these works):

• DNS over HTTPS turned off
• Uninstall all add-ons
• Reinstall Firefox
• Create new profile and set it as default
• Delete/rename certs.db in the Firefox profiles folder.

The only fix that works is to use Troubleshoot Mode every time I visit these websites which is not practical. Any ideas on what could be the problem?

I don't know if this is relevant but one of the websites that does not work is https://alexan.com.ph/

I have a question (speculation) about having several Firefox based browsers installed on my Windows 64 PC.

I have a Windows 10, 64 Bit PC with 64 Gigs of RAM. I've always had a habit of installing several versions of Firefox based browsers - all to no avail. However, as of recent, I'm finding that my browsers begin to slow down substantially after 15 minutes or so of browsing - please read on.

Right now, I have the following 64 Bit Firefox based browsers installed on my PC - they are:

Firefox Waterfox Floorp Librewolf

I have quite a large amount of bookmarks saved, and I make sure all browsers have the same bookmarks.

I have a half dozen or so of add-ons, and have tried - from time to time - to uninstall various add-ons to see if they were the cause of the slow downs, but none of that made a difference.

For example, let's say I'm browsing for 15-30 minutes or so, and have a half dozen different tabs brought up. After awhile, things begin to slow down substantially such as delays in clicking on links and having it respond, or right clicking, etc. Browsing speeds slow down substantially also.

Here is what I then usually do:

1. Create a new tab and type in "about:memory" and click on the save memory command.

2. Go into settings and delete cache.

This normally does nothing to speed up things, and I find I have to just close out the browser, wait a few seconds, and bring it back up to things to get back to normal.

This has me speculating - "Could" it be that having a variety of Firefox based browsers with similar data conflict with each other in some strange sort of way" Or is it something else? I know that having a bunch of tabs up can deplete memory usage, but as I mentioned above, I have 64 Gigs of RAM and never had this issue before.

My SSD drive has 500 Gigs of storage, and only half is being used.

Any suggestions or recommendations would be truly appreciated.

Ben Herrmann Fuquay-Varina, NC

None of the above; I am a dynasaur at computers and printers. I just want to send the email I have typed on my p.c. then IF POSSIBLE I would like to print it off. Thank you.

The Help is recommending clearing the startup cache, but I don't know what that is so I can't decide if it's something I want to do. Is it the same place that stores all my cookies and other saved material, or is it something different? If it's different, what does it store and why would clearing it be useful?

I get a message "We Encountered an Error" Please restart your application to try again. It continues to pop up (only when I'm in Firefox) and I click the button "close" and can continue until it pops up again. This just started today. Is there anyway to get this to stop?

I keep constantly crashing, multiple times. Here are my latest crash IDs:

bp-0095be94-4487-4e51-b895-8bfe30250106

bp-cc9fbd3f-9c73-4a9b-9e67-a503b0250106

bp-46a54455-3bd3-4eb1-8cdf-887300250106

bp-9d721d1d-f4e3-4e7b-9160-ec47e0250106

bp-f307e36d-2c7b-4fad-9166-47cef0250106

bp-3e823f9a-bcb3-458f-b149-94a110250106