Firefox Support Forum

I have been receiving the following error code 'PR_END_OF_FILE_ERROR' on several website on my Firefox browser. Sometime, not all the time, I get the same error message while trying to use YouTube, while other times the site loads but says that I am offline and no internet connection. I have done all of the fixes that they say to use online and nothing seems to work. YouTube will occasionally work but none of the thumbnails will show up. Then there are other site that work fine.

I currently have a Windows 7 PC with Firefox version 112.0.2 and normally use the EXE files from Mozilla's FTP site (ftp.mozilla.org/pub/firefox/releases) to upgrade Firefox.

With Mozilla's decision to move Windows 7 users on to the ESR branch of Firefox I was looking for the best way to install the ESR version using EXE/MSI files. In this regard I have the following questions:

1) Is it best to first install the standard Firefox 115.0.3 EXE (last standard Firefox for Windows 7 users) and then the 115.1.0 EXE (first Windows 7 ESR Firefox)?

2) Would doing the above method cause any conflictions?

3) I read a while ago that the ESR version is a separate install that can run in parallel to the standard version, if this is true would it be ok to uninstall the standard version after the ESR install to not leave vulnerable versions on the system?

4) As the latest ESR version is 115.5.0, if the above method is ok. After installing the standard 115.0.3 should I still install 115.1.0 ESR or move straight to 115.5.0 ESR?

5) When moved onto the ESR branch can you jump versions or do the updates have to be installed in order?

Running on an M1 Ultra Mac Studio, Firefox struggles to play 4K videos in recent days where it would've normally performed fine. I've never had troubles watching 4K YouTube on Firefox, until the past week or two. There are no other applications running, and only the one tab open in Firefox. Just a regular 4K video. Why won't it play properly? Why does it start buffering randomly when I can see my network is just fine? Why does it just randomly skip 10 seconds every minute or so while playing? This exclusively happens on 1440p or 2160p (4K). Please fix this ASAP.

Hello - I keep searching for various fixes to this, but nothing seems to work. I have the latest version of firefox. Macbook user. Catalina 10.15 I find that with almost any website that I'm trying to log into, or enter a credit card and other information, the browser does not show these items, pull downs, forms to fill in etc. I'll go thru a whole process of something, and will be directed to click a box or some such that just isnt there. So I move over to Safari, and the entire page loads. I've adjusted the privacy, cleared cache etc. It's like I'm on an ancient browser.

Any help welcome.

In my Firefox settings I have selected "check for updates but let [me] choose to install them" but Firefox automatically installs updates while I'm using it and immediately requires me to restart the browser. All navigation thereafter returns a page saying I have to restart Firefox to continue.

It's incredibly annoying to have to then sign in to all half dozen or more sites that I was already signed in to. I'm going to have to abandon Firefox if this continues.

Is it a security setting my employer configured? I think I have the same problem at home.

- Bruce

I used Firefox Sync when I bought my new computer and it worked perfectly. This time, I had to reset my computer and forgot my password. Using my account associated email, I reset my password and my information was gone.

Hi, I've set in my settings to use the unified search+url bar, Also I've set Google as my search engine, but when I type a search request Firefox searchs by default an URL, leading to an error every time, I don't know what to change and Ive tried different settings with no change

What would it take for Mozilla to offer a version of Firefox without permanently built-in plugins and/or extensions, and just offer them by selection upon installation, or offer a a registry editor program to add and/or remove them, or simply a paid-for version without them? A paid for browser that could be configured the way a person wants it would be worth the cost of such a browser.

examples of plugins and/or extensions desired to be permanently removed:

Amazon.com Bing DuckDuckGo eBay Firefox Screenshots Form Autofill Google Wikipedia

Refreshing does not work. Disabling does not work as they are enabled after another update, upgrade or by accessing your Firefox account.

Many years ago, M$ was sued for making Internet Explorer an integral part of the operating system yet is being allowed to do the same with Edge today. Just as back then, the browser cannot be permanently uninstalled from Windows, unlike with a Linux OS. Example: Mint will work perfect without the automatically installed Firefox browser should a user want to have a different browser. However, since undesired plugins and/or extensions can be permanently removed, there is no need to uninstall and remove Firefox.

Unfortunately, although I love the Vivaldi browser (which is built from Google's chromium architecture, just like chrome and many others) for any M$ or Linux OS, there are two features Firefox offers still unavailable with Vivaldi at this time. Therefore, Firefox remains my backup browser and for when I would like to use those two features unavailable with Vivaldi. However, Firefox would become the default browser not just for me, but an unknown huge number of users if permanently built-in plugins and/or extensions could be permanently disabled and/or removed because users want less intrusion and thus more security.

Firefox is a great browser. However, not being able to permanently remove permanently built-in plugins and/or extensions is more than a nuisance. Reason: If the built-in plugins and/or extensions can be re-enabled after an update, upgrade, or accessing your Firefox account, then there must be some type of script, sub-routine, program or AI detecting the permanently built-in plugins and/or extensions that have been disabled. That by definition is spying.

What is needed is a method to permanently remove permanent built-in plugins and/or extensions, or at least prevent the disabled built-in plugins and/or extensions from being enabled again.

Perhaps Amazon.com, Bing, DuckDuckGo, eBay and Google and Wikipedia are paying $$$ to be embedded within Firefox which may be needed by Mozilla for the ongoing development of updates and upgrades. If so, a paid-for browser might eliminate the need for Bing, DuckDuckGo, eBay and Google and Wikipedia to be included.

Thoughts and/or discussions?

Thanx!

problem screenshot Hi. I am using 120.0 last version firefox, Windows 11 also last build

When i open normal tab with Yandex search and search something, i get yandex captcha every time

When i open private tab firefox (also waterfox\librefox), i get captcha every search google.com. Change proxy with FoxyProxy fixing problem

Google chrome \ vivaldi \edge \ yandex browser and other chromium browsers doesnt have this problem

Hi, I got a new laptop recently and ever since then I've been experiencing this problem. Websites like https://tabs.ultimate-guitar.com or https://ukutabs.com offer the option to autoscroll, so that you can play your instrument without having to pause your playing and scroll further yourself. This feature hasn't been working for me ever since I got my new device and since it's various sites, I suppose the problem must be in the browser itself, I just can't figure it out. In the case of Ultimate Guitar, when I click autoscroll, it does move slightly, once, but then stops again, and you'd miss the movement if you're not paying close attention. I can switch between various speeds on this site as well, but it doesn't do anything. In case of Ukutabs, there's not even any kind of response from the site when I click the option. I tried turning on and off Firefox settings concerning autoscrolling and smooth scrolling, but nothing solved my problem.

Thank you for your time and energy, everyone!

Suddenly my ISP is HACKING into my browsers to give me "notifications" without my permission (see image), ignoring Firefox settings and UBlock Origin add-on. They appear above whatever website I'm loading. The company has my email address if they need to notifiy me of anything, so this just seems like a giant middle finger - a way to remind me of their absolute control over my computer. It's totally creepy. Is there any way to block them?

Hello!

I have the problem that every of my most visited sites are loading normal fast except for YouTube.

YouTube needs about 2 to 3 seconds to load the site itself and the thumbnails like "lagging" pictures which are rendering real slow while my other most visited sites like Twitch, Reddit or Twitter are loading in about 1 second or less. (i have installed the "Page Load Time" addon to check that).

I have only installed uBlock and nothing else.

For some reason Montserrat fonts ignore font-weight for me on all websites. In happens on my main browser profile, with a new clean one with no add-ons and even in Tor Browser. Pictures 1 and 2 illustrate the problem. If i go into page inspector and replace "font-family: 'Montserrat', sans-serif;" with "font-family: 'Segoe UI';" the parameter works as expected and the alternative font is rendered properly.

Reinstalling fonts from fontsource.org didn't help.

OS: Windows 10 1607, FF - 120.0, issue was present for many versions before.

I've been unable to play amazon prime videos on firefox for some time now. It comes up with error message 'video unavailable'. I've followed all the advice on amazon website and google searches but nothing works. what do i do ? (this is on asus zenbook laptop) I've tried checking for updates on firefox and add ons, restarting Firefox, restarting laptop, clearing cache , checking DRM settings and deactivating proxy servers.

What is going on with the Bookmarks function continuously duplicating? I've used the add-in tool (Love It!), but my bookmarks keep duplicating! What is going on & are you going to fix it? I use Mozilla Firefox exclusively as I don't like or trust Microsoft Edge or Google Chrome. Would REALY like to get this problem corrected!