Diễn đàn hỗ trợ Firefox

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.

Facebook page fails to fully load often (not always) and in some occasions it load partially -instead of a picture it shows a blank box with a description of what it is supposed to be on the box.

Using other browser (Edge for example) loads the page fine in the affected Laptop and loading on an IPad using Firefox works fine too.

I have "flushed" the WI-Fi and "requested" a new IP for this computer and it is hard to tell if this solves the problem temporary or it is just the on-off nature of the problem.

In other occasions the page appears to load ok but the pull down menu (like notifications) are "blank" or it just appears to be loading and never navigate to the requested page.

In the sample below (image) is similar to the issue although in this case the page loaded after a few seconds. Note the missing information.

After the most recent FF update, I can no longer upload pictures from my laptop to FB. I cannot see replies to posts in the main feeds. I have to go to the individual post pages to see them. Upon trying to sign into FB I often now get a message that says the feature is not working, but I click on it again and am able to log in. The feeds are taking a long time to load - I can see 3-4 posts and then icons that show the rest of the feed is trying to load, I do not have AVG or the other thing (bitdefender maybe, or something like that) others have been having problems with, that was resolved in a recent 'FB not working' thread -- that was supposedly solved with a recent update. A few minutes ago my laptop shut down while I was on FB. I did all of the suggestions regarding clearing the cache, cookies, etc. when I first noticed the problem so there is still a big problem with FB. I did report my inability to upload pictures directly to FB but I don't have any replies from them. Unrelated, I am sure, but my bookmarks were gone again this morning, for like the 24th time and I had to do the profile folder fix to get them back. I did not cache or other cleaning before I shut my computer down last night. It last happened a few days ago, unrelated to the cache etc cleaning after I noticed the FB problem. I have Norton antivirus and FF is synced to my cell phone but I prefer using my laptop for all internet activity because the screen is obviously bigger. I do not want to use another browser because of security issues. Thank you.

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)

A client of ours has recently raised an issue with with us stating where right-click, Paste does not work when adding text to a new LinkedIn post

After investigating, we have been able to reproduce the same behavior on our devices.

However, from our testing, we can right click to past on comments, messages and searches just fine

Troubleshooting already attempted:

Cleared Firefox cache Performed Firefox refresh Tested across multiple devices

We have confirmed this occurs on:

Clients device My work desktop My work laptop My personal desktop My Personal Macbook

This issue appears to have started after updating to Firefox version 151.0.0. I know this as i have tested this on my work laptop, appeared to work fine then stopped working after manually updating from 150.0.3 to 151.0.0.

Please let us know if there are any known issues, additional troubleshooting steps, or if further diagnostic information would help I have attached screenshots of the issue.

I have also tested this in the Google Chrome web browser and appears to be working correctly as also seen in the screenshots.

With Duckduckgo set as search engine, if I type a search or go directly to duckduckgo search page the current tab crashes and the "Tab crash reporter" is displayed.

Google, Bing, etc work.

I have Duckduck privacy protections, privacy badger, and ublock origin all disabled for duckduckgo.

For 24 hours now I have not been able to connect to Facebook via Firefox browser on my laptop at all. I can connect on my phone, but not my laptop. I've made sure there are no extensions on my browser, my firewall is off, all cookies and cache have been cleared, I even Uninstaller Firefox and reinstalled it. When I try to bring up Facebook, nothing happens. It won't even bring the page up. All other websites work fine. I can't even bring up Facebook to clear the caches in Facebook per the troubleshooting guide. It says to open Dacwbook and click the lock on the address bar, but I can't even open Facebook. What am I missing here?

i asked a few days ago i am on Firefox have been for years and do not wan to have to change. I am trying to video call with my family from messenger and when i try it say it can not on Firefox. Why ? i d love to but why can t firefox do video calling from messenger is it Firefox or is it Facebook?you will force me to go to chrome or edge which i would rather not do please let me kno why this is thank you

I have messenger loaded but with Firefox i can not video call when i want to call a friend or family. I have no way to call any one i do have a web cam. do i need to go to Chrome every time i want to call. Messenger has stopped desktop messenger that was how i could call but now i can not is there some way to Facebook video call on Firefox please let me know thanks I want to stay with Firefox why is there no way to get video calls on Facebook??

Hello all

 Firstly I have been using Firefox for about 2 decades and it has always worked perfectly - you can take a bow.
Now for my problem
I have been using Firefox for internet banking for many years without any problems - the usual login, password ans secret questions. Just after Xmas my bank updated it's website and suddenly nothing works. I was told that it now only works on Chrome and NOTHING else - not Firefox, Edge or anything else. I am able to log-in but can't see my account balances or perform any other functions - it just jams up to the point that I even have trouble closing Firefox.
I use Firefox exclusively because I don't trust Chrome or Google - they are just a massive data collection/sharing operation. I have Chrome Mask installed but it just doesn't make any difference.

 Is there anything that I can do or add-on to over-ride this problem?

I am running Mint Linux 22.2 with Firefox 151.0.1

I recently switched to Mozilla Firefox and noticed that one of my business websites won't open in the browser. I'm not sure whether the issue is with my website or Firefox itself. Has anyone experienced something similar?

Greetings,

For the past three days (A/O 06/01/2026) I, (and others who have posted on various sites) cannot access a functioning log-in page for Google or Gmail via Firefox. If I (and others) use an alternate browser e.g., Edge, the log-in page functions and displays as it should. However, when using Firefox, the page displays as the image I've included - no functional 'log-in' icon and no Username or Password box. Using 'Private Viewing' makes no difference. As other browsers work, I will assume this is a Firefox issue. As there is no way to submit trouble tickets, I'll leave this here in hopes that someone from Firefox will pursue the issue.

Thank you in advance for any information or resolution.

With Mozilla Firefox for Linux Mint 150.0 after logging into Chase Bank , when trying to pay off my credit card, I get a message: "It looks like this part of our site is not working right now". However the site works perfectly with Chrome, thus the problem must be with Firefox. I have cleared the Chase cookies and still getting the same result.

I used to be able to log into Peacock without issues. Either Firefox changed something or Peacock did. But it no longer works correctly. I can sign in, but the main menu appears for a split second, then the screen goes black.

When contacting my bank which I have been able to do for years I find that the login page of the bank opens and i put in the sign in details and send then nothing happens apart from the indicator just keeps on going round