Firefox 社群討論區

My Home page is a local HTML file featuring a CSS-based tabbed notebook holding links organized into various categories. When exiting FF, I always have this page as the active browser tab, so that on start-up it's still the active one in the event of multiple open browser tabs.

Until v151.0.4 (and still now with v152.0), if I exited FF with the active notebook tab (actually a styled radio button under the hood) in my CSS tabbed notebook something other than the first/leftmost tab, FF would restart with that being the active tab, but after a few seconds of CPU activity as the browser initialized the active notebook tab would switch to the first/leftmost one. (In my HTML I also have <input type="radio" name="tabs" checked> specified for this first/leftmost instance.)

Since the update, however, it remains stuck on the one from the last browser session as first displayed. I suppose I can live with this, but I do wonder what accounts for the change in behavior. If it's by design, where is it documented? If not ... maybe it calls for a bug report.

I realize there have been several questions on this topic, even with the same subject heading.

The popup generally appears if you're trying to exit or refresh a page but haven't hit post or submit after entering data into a field. It's a good warning in case you've forgotten to do just that. I accidentally restarted Firefox after an update, and when I returned to the site I was working on I got this popup. Which makes sense, because I had entered in a ton of data and hadn't submitted it.

However, the page that I was returned to wasn't the one into which I'd entered my data - it was more of a home page for the website. I suspect this is a lost cause, but ... is it at all possible that the browser actually has that data saved somewhere and is waiting for me to complete submitting it? Or is this just a false positive?

Firefox has just updated on my Windows 11 PC at around 1100 17/06/2026 and now I cannot access my Spanish banking online with Banco Sabadell.

When I try to log in I get a message saying 'the process cannot proceed because of security issues.'

I could log in prior to the update and I can still log in using Brave.

By process of elimination I deduced that it must be something to do with the update.

I am trying to turn on the Firefox built-in VPN. Instructions say click on the VPN icon in the toolbar. I have no such icon in my toolbar and I when go to Customize Toolbar, there is no VPN icon for the Firefox built-in VPN.

How do I get this icon to appear?

Attn: Customer Support

  Firefox is currently my "default" browser.  I am running the most current updated Firefox browser.  I am using a desktop iMac with OS of Tahoe 26.1     
  It appears since the latest few updates (on Firefox) over the last week or so, I can no longer log in to my online banking.  I am able to enter my username and password (I'm using the 1Password app on this desktop and my iOS).  After entering my username and password, the progress wheel just spins and spins and nothing further happens.  The screen just sits there and does not progress to the next webpage allowing entry to my banking.  I know that it is a problem with the Firefox browser.   When I log in to my online banking using Chrome, I have no issues, it logs right in.  
  What is going on?   Please advise.  I'm thinking about ditching Firefox and going with Chrome or Safari.

Thanks for your assistance Dennis Ontario, Canada

I have always been able to click on a box in the upper right to see my bookmarks on the left side of the screen.

This has now disappeared and the only way I can see the bookmarks is to go to "manage bookmarks". I don't see how to bring it back to the way it was.

I didn't knowingly change anything.

Thank you

I am no longer able to open in Mac Preview or save when hitting Command + P, then 'print using system dialog'. It will only print instead. For instance, I save certain web pages as PDFs using the print dialog and now it will only print when trying to use either the save or preview options. Command + P, print using system dialog, then I choose either save as PDF or open in Mac Preview, but as soon as I do one of these it will only print. I am able to use save in the drop-down list of printers, but I need to be able to open in Mac Preview.

As title says, on my main profile, i dont see any option to use the new tab widgets function. If i make a new profile, it is there on default.

How to add it on my main profile?

I'm generally just wondering if it's possible to remove the profile icons present in the top right corner of the Firefox app, and how to go about doing it if possible. Thank you very much!

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 am writing to report a recurring technical issue that began appearing today across multiple devices.

When attempting to access Google websites (specifically Gmail and Google News) using the Firefox browser, users are being prompted to identify themselves via a security certificate. Previously, this authentication step did not occur, and access was seamless.

Key Observations:

Impact: We have confirmed this behavior on three firm-issued computers as well as one personal device.

Browser: The issue is isolated to Firefox; other browsers appear unaffected.

Timing: This behavior was not present yesterday; it started manifesting today.

We suspect this may be related to a recent network configuration change, a new security policy rollout, or a browser update that has altered how Firefox handles trusted connections to Google services.

Could you please inform me whether there have been any recent changes to our SSL inspection proxies, root certificate stores, or DNS configurations? Additionally, does anyone else on the team have visibility into a widespread incident affecting Google certificates, or should we proceed with troubleshooting individual profiles?

When opening a new page in Firefox I am shown a few widgets.

It shows the time of sports events and different timezones. But it shows this in a non-local time format - the 12 hour format (so it says 06:00 PM instead of 18:00).

In about:config I found a setting called "browser.newtabpage.activity-stream.widgets.clocks.hourFormat" but what are the acceptable formats to use here? It's not a boolean value, and by default nothing is there. I tried writing 24, HH:mm, and some other things, but didn't notice a difference.

With Firefox 151.0.4 on Linux Mint I can login to https://www.ftb.ca.gov/myftb/index.asp with username and password, then I get the message: "You may have pressed the back button, refreshed during login, opened too many login dialogs, or there is some issue with cookies, since we couldn't find your session. Try logging in again from the application and if the problem persists please contact the administrator. " . Accessing FTB with Chrome works.