Diễn đàn hỗ trợ Firefox

Firefox 140 has lost all my bookmarks and passwords. I have these in Firefox 115 on another mnac but it won't transfer any files when I sync the two laptops and I can't get the new Firefox to import anything from an HTML

What should I do?

Some web sites such as Amazon have an options bars to select items like 'review order'. When the web page first comes up, they show white in the dark bar. But Firefox is immediately changing the white to purple so that it is almost impossible to read. I haven't been able to find anything in settings to correct this. I do not have this issue when I use Chrome.

I am having trouble with Firefox when making a purchase or submitting a form. I get right up to the submit function and nothing happens. If I go to the same site with Edge, everything works fine.

I am using Malwarebytes and Facebook Container extensions. Are either of these causing the problem? And if so is there a work-around?

I have a profile that causes odd behavior, within the profile, and to the OS.

Regarding the profile itself:

1. I use Multiple Tab Handler, which should allow me to move tabs on the tab bar with the mouse, but it does not (see image of proper behavior)

2. Normally, i can drag this padlock button to the desktop to create a shortcut. but now, it will not move/drag (see image 2)

3. I also have a backup profile from several months ago that has none of the above symptoms. However, If I substitute it's sessionstore.jsonlz4 file with the the one from the problematic profile, all the bad behavior mentioned above re-emerges.

I know this sounds strange, but, I also get external display issues when using the broken profile. These events are random, and manifest themselves differently, so I can't duplicate them. Essentially, these snips are examples of images from the taskbar tabs, or the clock area, suddenly superimposing themselves on the top portions of the taskbar toolbar area.

This is the view of my clock area (see next image 3)

In the following image, imagine that the portion on the left, that opens the start menu, is now hidden under what looks exactly like the clock area on the right, superimposed over it (see next image 4)

Those aberrations are removed by simply moving the mouse cursor over them, but they will continue to occur in any number of variations over any area of that top toolbar.

Is there a Session Manager that will save the session, to be later restored into that previous profile, but not also pass along the corruption?

Hello. I frequently shop at particular store and have never had a problem.

Now, it's off and on. One order will go through with the help of their customer service (doing a direct purchase). Then a few weeks later I don't have a problem and can order without assistance. Now, once again, I can't purchase anything. Once my credit card goes through my address disappears. Then I add my address again and then my credit card is deleted. When my address or my credit card is deleted the order has in bold red letters telling me to add it again. I've tried Chrome after Firefox had issues but it had an issue too.

Is there something I can disable while I shop? I'm not having any problems with any other sites. Thank you!

When I launch Firefox in Troubleshoot Mode and try to open the Settings page (about:preferences) right away, Firefox becomes unresponsive. This issue does not occur when Troubleshoot Mode is off.

I'm using Firefox 140.0.4 on macOS Sequoia 15.5.

Today, and never before has it happened, my Firefox web application abruptly crashed and closed itself while I was sending an email (earlier) and then searching for a spreadsheet in Google Sheets (just recently). Both times, the application also has disappeared from my computer by uninstalling itself I suppose - as I cannot simply reopen the app to pick up where I left off.

So, I've reinstalled it both times but each time - it resets my search history and pre-saved PINS and TAB GROUPS up top. So I have to recreate that each time. It's fine to do it once or twice, but it seems like something is going on here where I will have this problem be a daily or regular occurrence.

Any suggestions on how to troubleshoot this issue?

I was finally forced to update my Firefox to the released version. I am increasingly unable to log in to various "secure" websites with Firefox 140...1 although Chrome 106 (old, but can't update) has no problem. There are also a number of captchas that are simply invisible to firefox. Why is this happening?

I'm using Firefox, updated to version 140.0.4, on my Windows 11 laptop. Since Edge is my primary browser, I normally only use Firefox for two particular websites that don't work well in Edge. Beginning in March 2025, I've had a strange problem with one of those websites. In certain situations, words or phrases pop up in text boxes, meaning that if I want to type something, I first have to delete the word or phrase. Since it's a game website (not a video type game -- actually contract bridge) and the game is somewhat time-sensitive, this is very annoying. The words and phrases are ones that are appropriate to the website (i.e., not random), and seem to be the same in each session. That's why I labeled this as a "clipboard-related" issue.

Clearing the cache seems to help for a short time, but the problem always returns. <Ctrl>-F5 also helps, but seems to work for some text boxes but not others. In fact, <Ctrl>-F5 works for one type of text box, the type that I use most often, for the remainder of that session. But if I use one of the other text boxes, it doesn't help.

If that isn't strange enough, there are two additional oddities: For the other text boxes, the ones that are unaffected by <Ctrl>-F5, if I continue to use them, they eventually stop popping up words and phrases, again just for the remainder of that session.

The other oddity is that I'm using the free version of the LastPass plugin, and every time one of these words or phrases pops up, the LastPass symbol (a red box with three white dots) also appears at the right of the text box. This is completely inappropriate, since these text boxes have nothing to do with logging in or passwords. For this reason, I'm going to try to contact LastPass to ask about the same issue. However, their support isn't very responsive, so I'm hoping that somebody in the Mozilla forum will have a solution.

As I said, the problem only occurs on this one bridge website, and although I've been using Firefox to access it for several years, the issue never occurred before March 2025.

My copy of Firefox, installed on a MacBook Air, has suddenly decided not to open. When I click the icon I see a brief flicker on the screen but the application does not open. Version is 140.0.4. Has anyone else experienced this?

Under Settings; Privacy and Security, my Passwords have disappeared, and at the same time all of my Bookmarks disappeared also.

While I was online this morning, all of a sudden my Mozilla tab went blank and the Firefox Icon on the bottom tray disappeared too.

All 3 problems happened at the same time.

This is a disaster for me.

Can the Passwords be restored? What in the world happened to my system?

Thank you.

I tried to change my password but could not find an acct key, don't even remember having one! This is a new computer and it worked fine until I say that you are showing a very old picture for my account and showing I'm still on Windows 10!!! That is VERY OLD and I've used Firefox for years!!! I changed from Windows 10 to 11 on 7-1-25. Someone has hacked my account I guess!

What to do???

I have had this problem on several websites, but most recently Xfinity. com. Pages in their rewards page have buttons to accept a reward. These buttons don't show up in firefox, but if I use chrome they appear and work properly

Dear Firefox Team,

I am writing to suggest a new feature that I believe would significantly enhance the user experience in Firefox.

Currently, when we encounter a PDF file on the web, Firefox only allows us to view or download it as a PDF. It would be incredibly beneficial if, when a user clicks on a PDF link (or during the download prompt), there was an option to choose whether to download the file as a PDF or as a JPG image.

This functionality would save users a considerable amount of time and effort by eliminating the need to use third-party online converters or desktop software to transform PDFs into JPGs. This is particularly useful for extracting images or specific pages from documents for quick sharing, presentations, or website use.

I believe this feature aligns with Firefox's commitment to user convenience and efficiency. Thank you for considering this suggestion."

https://gist.github.com/ben-j-c/6d15852955d04c9018600d15d4a8a13e

Context: Here is an animation I generate with a program I'm developing. It being an SVG makes it useful to open in a web-browser. In chromium based browsers I have smooth animation, while in firefox I get much worse performance. At larger animations the problem becomes much more apparent. This is the approximately the largest animation that firefox can handle without lagging too much.

Expected: Firefox should have comparable SVG animation performance as chromium.