Firefox Community Forum

Is there something changeable in Firefox that would allow things to display better? On Tue, Feb 3, 2026 at 11:27 AM Douglas Flegal <toemeister@hotmail.com> wrote:

   It shows up in Edge but not in my browser Firefox.

Answer: Thanks for flagging this. We’re aware that some parts of the newsletter may not display correctly in Firefox, while they do load in other browsers. Unfortunately, this is a browser-specific issue and not something we’re able to control on our end.

Summary: Uploading a file to a custom webapp with Chromium (Edge) works but consistently fails in Firefox. In Firefox the request is created, and times out. The server receives no file and logs “missing file.” The same webapp code is running on both Chromium and Firefox.

Environment:

• Next.js app (pages/api route)
• Endpoint: POST /api/file-upload
• Client: fetch(url, { method: "POST", body: FormData, credentials: "include" })
• Server: export const config = { api: { bodyParser: false } } + multipart parsing (formidable)
• Edge/Chromium: Version 141.0.3537.85
• Firefox Version 147.0.3 (64-bit)
• OS: Ubuntu 22 / Linux

Steps to reproduce:

1. Create a FormData object and append a local file:

  const fd = new FormData();
  fd.append("template", file, file.name);
  fetch(`/api/file-upload`, {
    method: "POST",
    body: fd,

1. In Edge/Chrome, upload succeeds. Server receives multipart body and parses the file. Actual behavior in Firefox:

• Transferred: 0 B
• No response status/body
• Client times out (Upload times out)
• File upload request received
• No bytes read server‑side.

Evidence:

• Edge request logs:
  • content-type: multipart/form-data; boundary=----WebKitFormBoundary...
  • bytesRead ~1.69MB
• Firefox request logs:
  • Transferred 0 B
  • File upload missing file field

Notes:

• Client FormData is valid; we log file.name and file.size right before fetch.
• There is a CSP report‑only warning (frame‑ancestors) when using a fallback iframe approach, but we are not using iframe in the failing case.

Question: Is there a known issue where Firefox blocks or fails to send and multipart/body can be stripped before it leaves the browser? Is there a recommended workaround that does not rely on browser sniffing?

Moderator note: This question has been edited to correct the formatting.

'εχω προβλημα με τον λογαριασμο yahoo.mail. Ενω εισερχομαι κανονικά οταν ειμαι στο google στο mozilla δεν μπορω να μπω και ενω δεχεται τους κωδικούς . Μου βγαζει ως απάντηση : " Τεχνικό προβλημα .Αυτή την στιγμή δεν μπορούμε να σας συνδεσουμε δοκιμαστε καποια άλλη στιγμή " Μλησα΄με βοηθεια YAHHO . Εκανα ολα τα προβλεπόμενα αλλά τίποτα . Με έβγαζε στην λύση της συνδρομής . Μήπως μπορείτε να βοηθησετε? Ευχαριστω

For some reason there appears to be an issue between my gmail account and Mozilla/Firefox. When I delete an email, the email below it is also deleted, then I have to dig it out of the trash. It doesn't happen with every deletion, but almost all of them. It's been going on for a few weeks now and is most annoying. Any suggestions for how to cure this issue? Appreciate any help you can provide! Linda

I cant get Pandora to load with Firefox . I am in Mexico and have been using the Browsec VPN to listen to Pandora and all of a sudden it stopped loading. I get the blue screen with Pandora logo but it doesnt go past that. Pandora works on Edge with the same VPN Browsec .

Hello. I am using Linux Mint 21.3 cinnamon and Firefox 144.0.2 When I use Google maps and the yellow small pointer (cartoon) to go on a specific street, the window come black when shifting to street view. My only extension is disabled, hardware acceleration unchecked, cache cleared and cookies cleared. I have made fresh install and nothing help. Troubleshooting mode allow street view to work fine but normal mode don't work. Google chrome work good. Chromium work good. And finally, Firefox work ok on my Linux mint LMDE 6.

Any idea where to go to solve this issue?

Thanks for your support

André

I have an issue where Confluence stops working after a while.

The issues are as follows:

• Opening a link will work and show the page.
• After about 5 seconds, the page will turn black.
• Using the search bar does not work, no results show.
• Trying to expand items in the sidebar does not work.
• Clicking on a link in the sidebar does work, but it too will turn black after the same 5 second delay.
• You can't edit pages.

I have found two ways to temporarily fix the issue.

• Clear the cookies for Atlassian.net.
• Go into the inspector, switch to the Network tab, tick "Disable Cache" and reload the page.

Unfortunately, this only fixes it for a week or two until it comes back.

This is not specific to any one Confluence instance. Once one stops loading, all (that we have tried) stop loading.

Uploading/posting files via the Firefox browser on my laptop to Instagram does not work. It's been stuck on this window for 15 min (I'm using another PC for other work). The only reason I need firefox is to do this action. I don't want to use IG's mobile app for anything. I don't want to use any other browser because IG has me flagged with other browsers — they included my previous IG account in it's random ban via it's AI clean up of accounts for simply posting photos of surfers at a competition —( but that's for another topic for another day).

Any assistance with this will be greatly appreciated. Thank you and have a nice day! —Steve

After many years of using Firefox and then trying other browsers I decided to stick with Firefox now, and immediately I encounter a persistent flaw.

Mainly I browse on chess.com, I mention this because there the thing occurs and I can imagine it is quite a 'complicated' website. Stick with me. I administrate clubs and play chess there so open pages regularly, in new tabs, still generally only three simultaneously.

Every 1 in 5 times the page just gets stuck loading. Only parts appear and the little refresh icon up there doesn't show because the X stays (the one to stop loading the page). This is quite annoying. Simply by refreshing it immediately loads properly. But it is ridiculous to keep having to press F5 every couple of minutes before one can get on. As I also used Beta channel on my win11 machine I figured maybe it's that but after several updates it persisted. Now I am using the Normal channel and a Linux Mint OS and exactly the same keeps happening. I have tried a dozen remedies. Like adding an exception to the enhanced tracking in Firefox and several others and nothing fixed this. Does anyone knows how this happens?

And will Mozilla fix this? Or is it completely at the bottom of priorities because it is site specific?

Thanks for any replies (OS most recent Linux Mint Cinnamon. browser version mint-001 1.0 firefox 147.2) (Happened on Windows 11, Firefox Beta as well)

The problem that is occurring with Firefox is one website American Airlines, I can not log in to my account with Firefox, however Chrome has no problem logging in. Running Windows 11 up to date Firefox 147.03 64 bit. below is the error message I get Access Denied You don't have permission to access "http://www.aa.com/homePage.do" on this server.

Reference #18.450c3417.1770423478.9f1ea295

https://errors.edgesuite.net/18.450c3417.1770423478.9f1ea295

Thanks for any help. Rick

I'm having problems getting Firefox to work in Protonmail un able to send emails ...Copy& Paste......I think it is this New Version.............When I removed it from my applications & downloaded Google Chrome it all worked, that tells me the problem is with Fire Fox version I think

I am unable to sign in to my yahoo mail account. It gives me a fault that "something went wrong, please try another device". I can use brave as my browser and sign in with no problem but not with firefox. Any idea why?

I am unable to log into RBS site on Firefox but I can on Chrome and Edge. What's the problem and how do I fix it? This has only happened in the last couple of days.

1. After composing mail in Yahoo mail on my Mac laptop with Firefox, I cannot scroll down to "Send" to send the email I can Send using Safari on the same laptop,.

2. On the Website Sense.com, Firefox has changed the background. The original is baqlck background with yellow text; Firefox displays White background with blue text. Safari displays the original on the same laptop. I've been using Firefox since 2000, please stop tinkering with pages which work. I'd prefer to continue using an Open Source outfit rather than a Proprietary one, in solute of not having a Help phone number. ThANK YOU.