Firefox 技術支援討論區

Greetings everyone,

Firefox is my preferred browser and I really prefer the Firefox Engine over Chromium that most other browsers use.

I want to install a backup browser that runs the Firefox Engine in case my Firefox browser has a problem.

I searched a lot and I thought installing this would be the best option: https://www.mozilla.org/en-US/firefox/developer/

However, I’m worried that installing the Firefox developer edition will change my Firefox installation…

( :( :(

I've just done a Firefox refresh and lost the Keeper (password manager) add-on. When I try to re-install it I get 'download failed'. Never seen this before and everything else works normally. Tried rebooting.

I just installed the latest Version of Firefox 101.0 for Windows 10. Then when I tried to download a pdf file from my yahoo mail I received the following message: "Problem loading page" Firefox Can’t Open This Page To protect your security, dl-mail.ymail.com will not allow Firefox to display the page if another site has embedded it. To see this page, you need to open it in a new window. Learn more… Open Site in New Window Report errors like this to help Mozilla identify and block malicious sites

So, in order to open the page I have to press "Open Site in New Window"

Please advice why happened this issue and how can be fixed.

Whenever i restart Firefox, my download history gets deleted, but the downloaded files in the file manager don't. I have tried creating new profiles and altering my settings, nothing really works, its the same for all the files, and for all the new profiles i create too. Is there a permanent solution?

Hi, I'm trying to run and use Firefox as my default browser on Windows 11, but I'm running into some issues. The device is managed by Microsoft Family, which blocks Firefox by default. I got around this by renaming "firefox.exe" to something else. This works to get Firefox open, but the modified filename is causing Windows to not recognize it as a browser. As a result, I can't get Firefox set as the default for http/https.

I've tried tools like SetDefaultBrowser from Christoph Kolbicz but no success, it is unable to notice that firefox no longer exists as "C:\Program Files\Mozilla Firefox\firefox.exe"

Anyone have any advice on how to fix this? Windows seems adamant not to let me set the http/https protocols to anything it doesn't think is a browser (i.e. my Firefox installation).

I use Firefox as the browser for my email. Recently I have been unable to open or download pdf attachments (or any attachment) to emails. When I click on the attachment I get the message javascript:void(0).

I contacted the email company who said there was no problem at their end and that the problem was with Firefox and pop up blockers. I followed the advice in the attachment to unblock for my email account - but this did not solve the problem.

So I then tried Edge for my emails and I can open attachments in Edge.

So the problem is with Firefox.

Any advice please? Thanks

I'd love to have Firefox release version and Firefox beta installed side-by-side on my Mac. Is it possible? If not, how do I make it so without encountering weird problems? If any from Firefox's dev team are reading this, please just make this possible. Chrome and Edge do it. Firefox should, too, IMO. Thank you.

I think I may have downloaded and installed a fake/malicious application that looks/acts like a Firefox Browser installer. I noticed a lot of suspicious activity on my personal/work computer that led me to suspect my internet router was compromised. I work from home sometimes and I may have been tricked into downloaded and installing a malicious version of Firefox.

I suspect this Firefox installer is different because this installer is capable of circumventing the safeguards placed on my work laptop. My work laptop is managed by a university and I require an administrator's credentials in order to install/uninstall any programs, change/view any environment settings, or even open up and view task manager. This process entails actually having an administrator remote into my laptop, take remote control, enter their credentials, and ensure the installer completes.

So far, this unusual Firefox installer is the only installer capable of bypassing these security hurdles. And it does not detect any existing versions of Firefox to prompt an uninstaller before re-installing. The installer's visuals/progress bar appears to be a scripted animation.

I still have the installer in question saved on my computer and I'm not sure what to do with it. I'd like to find out more about it but I'm not sure how to go about it.

I got a new computer so I created an acct and set all my open tabs and history to sync. It wasn't intuitive to my not techie brain, but found out how to open all the tabs on the new computer. However, they don't open in the same order (makes it almost useless when you have a lot of tabs), and the tabs don't have their associated history.

Is there some way to have Firefox open tabs and history in the same state on the new device?

I downloaded firefox developer edition from: https://www.mozilla.org/en-US/firefox/developer/ But almost every 5-6 days it shows a prompt saying firefox have an update, download it from website we will help you install it. It's inefficient and time consuming to manually download and setup firefox after every update.

Using the latest 87.0 (64-bit) on a Windows 10 PC.

I always keep multiple tabs open when browsing of my websites that I use everyday. Tabs constantly crash and have to be reloaded. When I switch to a different tab the other tabs crash. Ads and videos crash the tabs. Firefox session crashes all the time too.

I believe something is corrupted and would like to do a complete cleaning of Firefox and install fresh while being able keep all my settings, bookmarks, preferences, addons, plugins, themes, etc.

I need complete step by step instructions or video to help me.

Installed plugins: Adblock Plus - free ad blocker Ant Video downloader Chirr App Copy All Tab Urls Google Translator for Firefox New Tab Homepage PriceBlink Coupons and Price Comparison RoboForm Password Manager Save Image In Folder Tab Session Manager Take Webpage Screenshots Entirely - FireShot TinEye Reverse Image Search Video DownloadHelper WebP image converter

Brand new windows 10 laptop. Installed Firefox just fine. I downloaded the Thunderbird exe install file OK. When I try to execute it, Firefox freezes. Tried about 10 times. i tried several different exe files. Any suggestions?

Howdy, fellow Firefox aficionados.

I'm running FF on a Windows 10 Home 64-bit desktop. Some time ago, I suddenly could no longer open Firefox because it couldn't find my Profile. So, I attempted to create a new one, but it would not allow me to do so.

"Changes Not Saved"

   "An unexpected Error has prevented your changes from being saved."

[See uploaded Image]

More than likely, either I, or one of my system maintenance programs wiped some data or folder. I have deleted Firefox and reinstalled it with the latest version, but this dilemma persists.

Thanks for reading my post and if you reply, a big Thanks!

This is going to be long sorry. A lot has transpired

My son was using 78.15esr. I upgraded it to 91.3esr. After the upgrade the browser worked; tabs loaded, surfing was fine, could go into settings and about:config was fine.

He went to watch something on Netflix. Netflix complained his browser was not supported and he needed to upgrade to the latest version - which at the time was 91.3esr.

In frustration he installed Chrome. When he tried to run it he was told software restrictions were in place. I had not set any restrictions, and I checked secpol.msc and there were definitely no path rules defined. If restrictions can be set in group policy I had not set them because I am unaware of them.

So he installed Microsoft Edge, which installed VC runtime for 2013 and 2015-2019 for both x64 and x86.

At that point Firefox no longer loads tabs at all. About:<anything> doesn't work. Settings doesn't work. You can't go to safe mode (more on that later), and when closing the browser two processes remain taking about 60 seconds to end.

I did have the group policy templates for Firefox installed. When I upgraded to FF 91 I installed the latest templates.

A couple of times when I started FF it complained about vcruntime140 was missing. But just running FF again worked without doing anything else.

So I reverted to 78.15; I uninstalled v91.3esr. I deleted his profiles.ini and profiles folder and then copied them back from a back up. I removed any registry settings, and copied back the v78 ADML files. I then installed v78.15esr with internet disconnected. Did not run FF after install. Went into group policy editor and turned off telemetry and auto updates then re-enabled internet

Run FF and same issue. tabs not loading. Pages not loading. I can click on a menu and I can type into navbar and search bar but there is no response. I checked internet was working.

I deleted the %LOCALAPPDATA% cache folders. I flushed the DNS cache. None of this worked.

So I uninstalled FF again, deleted the profile folders and ini. Disconnected from Internet. Deleted any registry settings, and removed the group policy templates. Then installed 78.15 from scratch and let it create a new profile.

Same darn problem. It seems to me that installing chrome and/or edge has done something nasty, but I have no idea what. I say that because before he did that he could surf the web, but Netflix just said his browser ver was outdated.

I tried contacting netflix on chat but they were worse than useless.

So I uninstalled again and removed everything. Connected the internet and installed FF again and let it update automatically. Same problem.

I've left him with edge but I need to fix FF.

I even uninstalled the VCLibs, Chrome and Edge. These did not fix the problem.

I tried safe mode but when firefox restarts there are two processes that take 60+ seconds to end so FF sits there saying "restarting...". When those processes finally end Firefox does not restart.

Checked for viruses; nothing found. Rebooted PC several times.

So at this point in time; FF will run but will not load the 3 tabs; Facebook, Netflix and youtube. They stay blank. Settings is not accessable, nor is addon's or logins and passwords. Typing anything on the search bar does nothing Typing anything in the address bar does noting Trying about:config or about:profile or any other about's does nothing. When closing FF two processes take 60+ seconds to end.

If I go back to him and tell him I need to reinstall Windows he will go absolutely nuts.

What also worries me is that Netflix said that the most recent esr browser version was not supported and that he should update to a later version.

And what is even more troubling is I updated his girlfriends PC at the same time and hers works perfectly. This scares the hell out of me because I then expect responses like "Your sons problem is not a firefox problem".

My wife has an older Mac. About a week ago, a pop-up from Firefox told her to update her program. She loaded in the new one and when she tried to open it she got the message that her computer was too old for the update.

We had to reload the most recent update which had been running on her computer.

Now, none of her bookmarks show up and the bookmark toolbar will not display near the top of the screen as it used to.

None of help items online are of any use because what they say will show up on the screen (such as when you enter "about:profiles") is not what shows up on her screen.

Is there any way to recover her bookmarks, passwords and other saved data, please?

Dear Friends, Why don't the Firefox ESR updates install on my computer anymore - it won't go past 102.5? I keep hitting the download, then install the file and restart Firefox and even the computer sometimes, but it will NOT install the new versions.

Why?

It always has in the past. Now I can't access my online banking due to their security measures. Very upset!

Please help me. Thank you.

What setting will stop the constant notice "Download the latest version of Firefox." I don't want 20 notices per day. It's like having a child in the backseat "are we there yet?" "are we there yet?" "are we there yet?" How many times do I have to click the "Dismiss" button before this stupid software understands that I do not want updates? I've noticed that this is a common complaint. Stop the bullying by making people choose automatic updates. Many times things get messed up on my computer with updates and it is not worth the aggravation. Candace M.

I'd like to update my mac's firefox, but not to the latest version. I know about the directory of releases, but I can't seem to find advice on what to do once I download the file. I don't want to create a separate profile, or risk messing up the profile/settings I have currently. So, any thoughts? Thank you in advance for the help.

1. Whenever I boot my laptop, FIrefox is always downloading an update and it is always the same version i.e. 91.0a1 (2021-07-06) (64-bit)

2. I do not know if it is yyyy.mm.dd or yyyy.dd.mm