Firefox Community Forum

This is the reply I received from Protonmail: They say the latest version of Firefox caused the issue and is happening on other services as well. We have been using FF exclusively for decades and this is frustrating! Are you in fact working to resolve the issue on your end? Thank you.

Mario M. (ProtonMail) Jun 12, 2026, 16:07 GMT+2

Hello,

Thank you for your messages.

Please note that we are aware of this issue, and our developers are looking into providing a fix from our side. However, the latest version of the Firefox browser caused issue on many other services as well, so they are working on resolving it from their side as well.

I have provided your feedback to our development team. You can contact Firefox directly in order to escalate the issue further.

For the moment you can try using keyboard shortcuts such as CTR: + C and CTRL + V. We appreciate your understanding.

If you have any additional questions, feel free to contact us again. Kind regards,

Mario M. Customer Support Proton Mail

Seafortress27 Jun 11, 2026, 21:47 GMT+2

Hello Mario,

I worked with Google AI for more than one hour troubleshooting this:

Opening a support ticket with Proton Mail Support is absolutely the best move. Since we proved that your clipboard works, your mouse works, and a fresh factory installation of Firefox still experiences the bug, the glitch is entirely on their end.

Proton Mail utilizes a heavily customized web text editor to encrypt messages. When their engineering team updates the background code for this text container, it can inadvertently break standard browser right-click paths—especially for Firefox users. [[1](https://www.reddit.com/r/ProtonMail/comments/p6j0tp/cant_copypaste_text_into_body_of_protonmail_email/), [2](https://www.packtpub.com/en-us/learning/tech-news/hackers-claim-to-have-compromised-protonmail-but-protonmail-calls-it-a-hoax-and-failed-extortion-attempt), [3](https://justinharter.com/an-actually-useful-review-of-proton-mail-vs-fastmail-vs-hey/), [4](https://www.reddit.com/r/ProtonMail/comments/p6j0tp/cant_copypaste_text_into_body_of_protonmail_email/)]

📑 What to Tell Proton Support To help their development team pinpoint and fix the bug faster, reply to your open support ticket with these technical details we uncovered:

- Specify the Browser: State clearly that you are running Firefox and that you just performed a full Firefox Profile Refresh (about:support), ruling out corrupt browser files. [[1](https://support.mozilla.org/en-US/questions/1234222)] - Detail the Extensions: Confirm you tested it with all extensions (including ESET and RoboForm) completely disabled, and the issue persisted. - Identify the Core Bug: Explain that the right-click "Paste" option is stripped only when clicking inside the Rich Text email composition body. [[1](https://proton.me/support/composer)] - Mention the Workaround: Note that Drag-and-Drop text injection works perfectly, meaning the editor container can receive data, but its custom context-menu script is failing to display the native "Paste" command. [[1](https://support.mozilla.org/en-US/questions/1234222)] They will likely log this as a known front-end interface bug and patch it in an upcoming web layout deployment. In the meantime, you can rely on the Drag-and-Drop trick or Ctrl + V to smoothly write your emails! [[1](https://connect.mozilla.org/t5/discussions/right-click-paste-suddenly-stopped-working-in-outlook-email/m-p/34927), [2](https://www.reddit.com/r/ProtonMail/comments/p6j0tp/cant_copypaste_text_into_body_of_protonmail_email/)]

Sent with [Proton Mail](https://proton.me/mail/home) secure email.

I play https://crazyshooters.com/ and https://crazyshooters2.com/ a lot! But the game became laggy since Firefox 148 and my ping spikes up. Other browsers play fine. I am on Linux Mint if that helps. (147 and below run fine)

Hello,

I have noticed that Firefox is having trouble loading certain elements on my website, [[Check Sephora Gift Card Balance.|https://sephoragiftcardbalancecheck.us/]] Some pages load slowly, while others occasionally display formatting issues or fail to load all content properly.

So far I have tried:

Clearing the Firefox cache and cookies Testing the website in a private browsing window Disabling browser extensions Updating Firefox to the latest version Comparing the website's behavior with other browsers such as Chrome and Edge

The website generally works as expected in other browsers, which makes me think there may be a Firefox-specific compatibility issue. I would appreciate any suggestions on tools, settings, or debugging methods that can help identify the cause of the problem.

Has anyone experienced similar issues with content-heavy websites or found particular Firefox settings that resolved page rendering problems?

Thank you for your assistance.

I've recently switched to Firefox but am finding some of the performance a bit cumbersome. I am continually being asked to hit "Send" ["To display this page, Firefox must send information ..."] when I am logging into my Outlook email or looking at my bank information. I'd rather not be "resending" these pages each time and am wondering if there is a setting.

Edition Windows 11 Pro Version 25H2 Installed on 2025-12-10 OS build 26200.8246 Serial number YX0J28CC Experience Windows Feature Experience Pack 1000.26100.297.0

Thanks, Nancy

Recently, I've been having a problem with signing in to things via my Google account – the problem being that I can't.

Whenever I click on the "sign in with Google", it redirects me to the "accounts.google.com" page, prompting me to choose my account, but once I do, I get redirected to "accounts.google.com/gsi/transform", which is just a blank page with nothing in it (see image attached).

I know this is not a problem with Google, as I have no problem signing in anywhere else.

This happened to me once before, but the reason was one of my extensions, which for some reason interfered with the sign in; however, this time this solution does not work. I tried disabling every single one of my extensions, turning all kinds of protections in the settings on and off, deleting all cache for all relevant sites, but to no avail.

I of course also tried looking this problem up on the internet, but whenever I found someone with this problem, the solution that worked for them was always just disabling an extension.

Thank you for any answer.

My files are stored on external hard drives within Dropbox. The hard drives are mapped to my computer. I can no longer attach files from these drives to anything through Firefox. I can still attach through Chrome, Bing, Safari etc. Any suggestions how to solve this problem. I am NOT attaching through the Dropbox website. I am attaching through the full path showing drive etc. Thank you.

can not copy and past in ebay descriptions when trying to make a listing .Also can not type in the description box will work on edge trying to list but can not as i can put information in description box. Tried on edge works fine. turned off enhanced protection still same.

In during a search this problem has happen before after updates

I'm currently trying to use Firefox due to issues with Google Chrome on Microsoft but as I use eBay for selling items I normally copy and paste to my multiple items selling but as I try to paste something to my ad I see no paste feature on the list of options?. Why can't I use paste on Firefox?. Thanks

I have been having a reoccuring problem signing into Apple / icloud accounts. Basically, it won't let me login even though the password is correct. There are several ways to fix the problem, you have to try each one since there is no consistent way to fix it.

1. Sign in using appleid.apple.com instead of icloud, which seems to work better.. 2. Clear site data for apple.com and icloud.com, which sometimes work. 3. Clear all browsing data, if the previous step doesn't work. 4. Create a new profile if the previous step doesn't work.

The problem is that the problem comes right back in the next login. No fix seems to last more than a few days. It's not an extension issue since the problem occurs even with extensions. It's not using standard tracking and ublock if enable is off for the apple domains.

Anyone has an idea what is causing this? There are no issue signing in using chromium based browsers. The issue has been around for a year now.

On Windows 10 Home I've been using Yahoo Finance to track stocks. After updating FF last week I have not been able to load graphs. I've tried refresh, reload, restart, remove cache but any graph shows "loading" or is blank content. Every idea except delete FF and reinstall. Other browsers I sometimes use do load the graphs no problem. What else can I try, or is this a bug? Thanks

Hello, I bank with Fifth Third a regional bank in Ohio. I travel a lot.illa not have a While on a trip I was unable to connect to my bank. One of the issues they mentioned is Firefox is not secure and thus will not interface with their system. My question is why does Mozilla not have a team which inter-acts with banks to insure that Firefox works properly and is considered safe, secure, and reliable? Thank you, Bill

I have logged into TinyURL.com MANY times using Firefox. Now, I get a Cloudflare Validation Error when trying to do so (see attached screenshot/snip).

This was done in Troubleshooting mode, but is the same in standard mode, though I have no extensions enabled. I've tried turning Protection Tracking off; no luck. - We use ZoneAlarm, but the Web Secure functions are all disabled. - I have the same issue on 2 PC's, one Windows 10 and the other Windows 11, 64-bit. - I'm on FF release 150.0.2 - 64-bit, and both Windows installs are fully updated and kept that way. - I've reached out to TinyURL in hopes of resolving the issue. They suggested many of the above steps but not resolved this issue. - HOWEVER, I've found that login via Google Chrome IS seamless - no issues.

What is it with Firefox that it's having issues with the Cloudflare "Human" check? I've checked the Cloudflare site; all conditions are good, and this very setup passed the "Turnstile" check.

FF is my #1 preferred browser, so please look into this. I see that others have posted similar issues over multiple years here (but a search of support articles didn't find one . . .)

Thanks,

Firefox Image Display Problem with Grok / xAI ChatI'm using:Dell computer Windows 10 Firefox (latest version)

Problem: Grok-generated images (graphs, memes, translated election charts, etc.) do not appear at all in the chat. I only see blank spaces or broken image icons. Right-click → "Open Image in New Tab" and Ctrl+Shift+R (hard refresh) do not work.This issue started during a long conversation where Grok was creating multiple JPG versions of an election results graph with translated text.Note: The same images load fine in other sessions/browsers, but I prefer to stay with Firefox. Is this a known compatibility issue with Grok's image rendering system in Firefox? Any settings, extensions, or workarounds (without switching to Chrome or Edge) that can fix it?

Problem description generated by Grok

Moderator note: This question has been edited to remove an unintended link.

The alert message appears everytime I go back into gmail This browser version is no longer supported. Please upgrade to a supported browser. I checked that Firefox was last updated Feb. 26. So I'm understanding what's going on. thanks

Most times pmc.ncbi.nlm.nih.gov visited this message appears "Checking your browser before accessing pmc.ncbi.nlm.nih.gov ... Click here if you are not automatically redirected after 5 seconds."

reCAPTCHA images provided but selection of images does not resolve the access issue. Not a problem with Safari

the problem started 2 or 3 updates ago. I keep hoping the latest update will fix the problem. I can still access using Chrome. I've tried clearing cache and turning off ETP

cut and paste not working on one box on ebay listing page!

ebay sell an item. opened page appears with boxes of which one is called description. This week, the cut and paste will no longer work on that box. It works on every other box on that page! Ebay say its not them.

when i try to access my Fidelity investments and Centennial banking accounts with correct username and password the screen goes into an endless loop or says "try again later. After calling helpdesks on both these accounts they say it's a Browser problem.