Firefox Community Forum

I often receive a 403 error when using Firefox Every time, before this happens, I get the unsafe website warning and then the 403 error when I continue anyway

I am using the latest version at the time of writing These errors only occur on my desktop PC I have tried to replicate this issue on both my phone (Android) and another laptop(Windows 11) but all the websites work normally on there.

I have tried the following, none of which have any effect:

• Clearing cookies
• using Troubleshoot mode
• Restarting
• Changing Useragent
• Using "Forget about this site"

The following do fix the issue

• Using a VPN
• Using Google Chrome
• Running Firefox in another profile

Going through the privacy and security tab and reseting all the settings sometimes works but only temporarily

The following are a few websites where the issue occurs

1. https://kdice.com/
2. https://latinitium.com/
3. https://theysaidso.com/
4. https://opensource.org/
5. httpe://obsidian.rocks/

I keep experiencing this problem with different websites: Safari works, Firefox doesn't.

Sample: I turned out the enhanced tracking protection, Privacy is set to Standard for

https://search.ccb.state.or.us/search/default.aspx

I entered valid license numbers (230880, 239798). Firefox displays NOTHING, no error message. Safari displays the relevant info.

Why is this and what should I do if I want to continue using Firefox? Thanks.

When open Google Drive using Firefox, I cannot click on any documents. I can open folders but the documents in these folders I cannot open. I can open Google Docs and then access documents but all documents through Google Drive including in the Shared Folder are greyed out and when I click on any of these I get the pop up "This file cannot be opened because you're offline." I can access Google Drive and its documents using Chrome. I would prefer to use Firefox.

I have updated Firefox, cleared the history, and emptied cache and cookies. I also logged out of and then back into my gmail account.

The image shows what the drive looks like when opened in Firefox.

Cannot Log on to Costco.com site after update to Firefox 133.0 in Win 10 pro on 2 computers. Both are up-to-date with latest software.

Entering valid account and password cause the Costco logon page to freeze for a minute then returns to log on screen with no messages about failure

Same behavior on two computers. Log on to Costco via Microsoft Edge works perfectly (on 2 computers before any trouble shooting ). Logon with Firefox 133.0 works with every other site that I regularly use - Samsclub, Amazon, Yahoo mail, my own mail servers, NYtimes, WashingtonPost, Google, Walmart, and others

Trouble Shooting Steps taken with no change in the problem logon to Costco + Cleaned cache / cookies + Disabled virus protections + Disabled firewall + Stopped all security services + Rebooted + In settings | Privacy & Security: Added Costco.com as Exception for Enhanced Tracking protection + In settings | Privacy & Security: Added Costco.com as Exception - Cookies and Site Date

I have a 1848ETC-HST data logger from Real Time Automation on an isolated network that does not support HTTPS but Firefox keeps changing it to HTTPS. I tried a private window with the same results. HTTPS-Only Mode is disabled. I entered an exception even though it should not need it. It was working in Firefox at one time and it still works with safari and chrome.

I am so frustrated. Although I'm relatively computer literate, I cannot find a way to stop that sidebar from opening up on Firefox Browser 133.0. I'm using Windows 11 Pro. I can find no button that allows me to either delete it or prevent it from opening. For heavens sake, not everyone wants all this stuff. I just want a great browser with minimal things to have to deal with. It is irritating to have to deal with this when there appears to be no simple solution to get rid of it. I do not feel comfortable with having to try to delete a profile element. Just give me the button to say I don't want it showing up when I open Firefox on my computer. It can't be that difficult. I use the menu bar at the top of the page to deal with bookmarks. I don't need a sidebar. Give me the option to get rid of it. It will always be there to hit the button on again if I choose to but I know I never will. It interferes with my page. If it isn't fixing something that is broken, and you want to try new things, fine. But give me the option to delete it from my experience.

https://github.com/uBlockOrigin/uBlock-issues/issues/3468 https://www.reddit.com/r/uBlockOrigin/comments/1h0f3wg/ublockorigin_can_cause_the_black_screen_of_death/

The extension developers claim that the issue is with Firefox and deny no fault whatsoever.

I had my application running on the Firefox earlier version where the an insecure content loaded over http from my server was being displayed on my webpage which is on https.

But with the latest versions of firefox this solution is no more working. For example the below i have a pic loaded from my server path say http://10.16.15.2:9181/pic/Pic?id=41234 .Now i need this to be displayed on my secure web page application, but the firefox browser is automatically converting to a https path. See the output from the debugger console

" Mixed Content: Upgrading insecure display request ‘http://10.16.15.2:9181/pic/Pic?id=41234’ to use ‘https’ "

Kindly suggest a way to disable this auto conversion in the latest versions of firefox, as i have no option to update the front-end or back-end of my application.

Thanks for your help in advance

I have used Firefox for longer than I care to remember and have never had any problem with it but this morning I switched on my PC and a new AI side bar has appeard on the left and I don't want it. Can you please make it so we can remove it and looking around the internet, I know I'm not the only one with this opinion.

Dear folks , Every time I click on Firefox for web search , Fragilepottery.com comes up , I simply cannot find a way to delete Fragilepottery , should I uninstall Firefox and install Firefox again ?

My connection to the Swiss bank UBS.COM is refused for connection to my account. UBS says it is a Firefox problem, because it accepts a Chrome connection!

I tried to open Firefox and a message appeared: "Couldn't load XPCOM". I uninstalled the program with Revo Uninstaller Pro and downloaded the latest version. I selected Run as Administrator but there is a message that says "Windows cannot have access to the selected device, path or file. Maybe you don't have access rights". However, I do have access rights. I have checked it multiple times. How can I install Firefox and see it work properly? Thanks

Hello! I am a developer, and I am making my own adblock-based Firefox Extensionto block ads. And I have a problem, I use manifest 2, ads are blocked, but the changes are applied only after the Extension is restarted, which should not be the case. Maybe there are some specific settings that I have not found, because for example on Opera and Chrome the Extension works perfectly and the changes in the blocking rules are applied immediately without any application restarts.Thanks for your help

I just experienced the XPcom not loaded issue. Uninstalled Mozilla Firefox and re-installed. All of my logins and passwords are no longer available in programs I saved to the "Pocket." What can I do?

web page Northern Tool wont display. Get a page that says "Northern tool cant display in your country" Is a US company - I have an account there - get emails from them every week. This just started last month.