Diễn đàn hỗ trợ Firefox

Hello, I need help. I downloaded and installed Firefox (latest version), the icon appears in the taskbar, but when I click on it, FireFox does not launch and I always get the same error message. I uninstalled, reinstalled, restarted the PC, but I still have the same problem, even starting from firefox.exe in Windows (C:) >Programs>Mozilla Firefox. Could it be possible that Microsoft is blocking the launch of Mozilla Firefox? Thank you in advance for your help. Attached is a screenshot of the error message. Fortunately, my Mozilla Thunderbird (15.4.2 (64 bits) works fine...

See pix. I have my PC set to NOT auto update, yet it still does. Every time you guys post an update (which is super frequent) it locks up my PC for an hour or more! I have to restart it several times before it reconnects to the internet.

Firefox bookmarks exported from old Windows PC to html file. File transferred to new Windows PC and imported into Firefox. 'Bookmarks Imported Successfully' message seen. However no bookmarks visible in Firefox bookmark menu. Suggestions please?

Please allow me to visit http://www.hbdc.ddns.net:8080 I've been able to watch the cameras for a few years. Thank you.

I have had Firefox for three days now, and I was trying to watch some videos on Netflix, but I got this error that the DRM was not installed. I did not have any plugins installed or VPN on either. I was looking for steps to solve this but came to a dead end. I tried looking into the console, and it gave me errors with turning off/on the DRM. I would like to get some help with this.

I need to know how to stop Firefox from automatically downloading .pdf files that I view. Sometimes I just want to view a pdf without downloading the file. Firefox keeps automatically downloading the file, then after viewing it, I have to manually delete. I don't to do this! I just want to view the file and if I want to keep it, I'll save a copy. This is extremely annoying! Can I change the settings so that the file won't automatically save to my computer? and i want show my file or pdf then i want to download the file

I made a mistake and installed Firefox in the wrong location. I uninstalled and attempted to reinstall where I wanted the software to be.

The installer now tells me that I had Firefox before and will only reinstall it in the previous directory. No other option is offered.

I am LONG used to being deprived of user choice by the likes of Microsoft or Apple, but Mozilla SHOULD KNOW BETTER.

Can you help?

Thank you.

Dear Community,

To be completely honest, I was redirected to this form for this issue after it was posting in the discussion forum too many times about this.

The problem: Firefox has the behavior to download an update and force me to restart my browser

The issue: Next to the fact this is a very obtrusive behavior (or simply...not polite) it is in fact messing up my workflow and mood.

Why important? (at least according to me): First workflow: Using a lot of active connections / 2FA logins in combination with a secure setup where my browser doesn't remember a lot after restarting for security reasons, I need to perform multiple logins again while working with online services. It messes up my worflow, negatively affecting productivity. Also, it generates awkward situations when being in an online meeting, sharing a screen and this happens... unwillingly, unknowingly and just untimely. Updates are irregular and often (which is a great thing it itself!)

And that brings me to the point of mood. Less important -yes- my mood to anyone really I know. It is just a big frustration. I have been using FF since the Netscape days, always advocating for this browser, showing others, helping other to use and see the benefits... And this feels (note it is emotion) like a bad pay back for all those years. Several occassions I just used Safari and it just seems easier. But..I want FF, for its belief, how it was setup and its security and privacy.

I know there are more people that experience this issue.

Please let me know. // Is this issue known to you? // Does it have any priority? Is there a solution being generated? // I have tried things, nothing worked. Willing to try, but please don't come with the right 'settings' ... believe me I have tried. The only options seems to be to completely disable the updating process in the about:config page... but that seems unwise. What do I miss?

Please advice, so I don't get to see the page as in the attachment.

Best Regards,

Matt -the Netherlands-

When I try to install Firefox on my Steam Deck (Which came with the installer). It doesn't open. It just says "Cound not open appstream://org.mozilla.firefox because it was not found in any available software repositories.

Please report this issue to the packagers of your distribution." It shows it every time I open the installer ever since I got the thing.

cant find how to add another account, every help thing i find seems to be outdated. i have multiple accounts i use on chrome, and want to move some to here, but i need help finding how

Where can I get Firefox 52.9.0? There was a list of old versions here but now I can't find it. I found https://download2.portableapps.com/portableapps/FirefoxPortableLegacy52/FirefoxPortableLegacy52_52.9.0_English.paf.exe I really did not want the portable version but avast considers it a threat so it may not be genuine.

New computer (Windows 11) shows 'Old Firefox Data'. Opened hidden files. Using File Explorer found Profile Folder & renamed it 'old'. Copied and pasted 'Old Firefox Data' as new profile. Firefox would not open. Had to remove etc and Firefox worked again. Thought this maybe the easiest way to get my Bookmarks back.

PS Presume Profile Folder does not contain Thunderbird Addresses?

I was trying to update firefox but kept getting an error of download failed. I uninstalled firefox, but I now cannot even download the setup file, using either Google Chrome or Microsoft Edge. All I get is is an error saying "site cannot provide a secure connection" (see attached image). How can I re-install Firefox?

Dear Community,

I am trying to download a large file. Am on a course, and the main tutor has given the group a file to download. Have tried downloading this 5 times, but get little luck. The file that I would want to download is 8.5GB, and the furthest I get is about 4GB.

I have 2 questions about this.

1) I seem to have a very 'in and out internet connection. It seems to go down at times for no reason, cutting off the download. Is there anything I could do about this? How could I troubleshoot this, please? 2) Does anybody know of any special tools that I can use to download in a more efficient manner, please? Perhaps an extension for Firefox might be able to do this, perhaps? Kind Regards to Anyone Answering this Query, Marek

I've been doing this sort of exercise for some time, but I want to verify exactly which files and folders I can confidently transfer from one profile to a new or an already established profile without causing unexpected issues.

According to Recovering important data from an old profile , these are the files that can be moved:

places.sqlite favicons.sqlite key4.db logins.json permissions.sqlite search.json.mozlz4 persdict.dat formhistory.sqlite cookies.sqlite cert9.db handlers.json

I also include:

The "sessionstore-backups" folder sessionCheckpoints.json sessionstore.jsonlz4

Here's the list I need feedback for:

The "settings" FOLDER

activity-stream.discovery_stream.json activity-stream.topstories.json AlternateServices.txt autofill-profiles.json blocklist.xml broadcast-listeners.json cert9.db compatibility.ini containers.json content-prefs.sqlite notificationstore.json pkcs11.txt protections.sqlite SecurityPreloadState.txt serviceworker.txt signedInUser.json SiteSecurityServiceState.txt targeting.snapshot.json Telemetry.FailedProfileLocks.txt Telemetry.ShutdownTime.txt times.json webappsstore.sqlite xulstore.json

Please also let me know if any other folders are ok to relocate as well.