Firefox Support Forum

I installed Firefox years ago. This morning, when I click on the browser icon, I get this message: Error platform '127.0.2' is not compatible with minVersion>= 127.0.1 maxVersion<= 127.0.1

What is going on? The browser updates itself so I don't do anything. But now, it doesn't work. I use an alternate browser to send this message to you.

I am using Firefox 127 on Ubuntu.

When I press the Control key, I often lose focus in the window I am currently viewing. This is annoying as it prevents me from copy-pasting for example.

Sometimes the focus is back when I release Control, sometimes it is lost and I have to click again on the text field. It does not happen on all websites, for example support.mozilla.org works well, but it happens on duckduckgo or overleaf.

It does not seem to be the same as existing issues such as [the "show mouse when press Ctrl" of Ubuntu] (it is disabled) or an addon (the problem still happens in safe mode).

In case it is useful, when I press Control the tab bar background goes slightly darker, see attached images.

Thanks for your help :) Nicolas

I am running Mac Big Sur, 11.7.10. When I am in Firefox version 127.0.2 and I go into any Google search, the tab crashes. It works in private browsing mode and also in other browsers but not in non-private browsing in Firefox. I have tried disabling extensions, add ons, etc. Nothing seems to help. This started happening a few weeks ago with any YouTube page also. How can I fix this? If I can't I will stop using Firefox as I cannot function like this. Please advise!

Automatically hide taskbar in desktop mode => Enabled Firefox => Maximised When cursor is moved to outer edge of screen, taskbar should unhide (Expected behaviour) but in this case it remain hidden (Reality). Firefox along with all other spinoffs give same result. Chromium based browser works perfect, and taskbar automatically unhide itself.

As OLED screen have became common as monitor, Taskbar auto-hide is must. If this issue cann't be fixed I may have to change my primary browser which I used for almost 15 years.

Kindly, look into it. If Chromium can do it, why not Firefox.

Hi, I hit Foxfire icon, I get XUL Runner message,

Error Platform Version 127.0.1 is not compatible with mini version ] = 127.0 and max version ] = 127.0

How do I correct and gain access!!???

Please help, definitely liked days of yore when one could call.

Andrew

When a user opens hh.ru / headhunter.ru (famous HR portal in CIS countries) in Firefox, and then opens dev panel and tries to interact with it, especially with the code inspect tool, the whole browser stops responding.

The problem persists even on a clean Firefox profile. Other browsers (Chromium-based) work well with the dev panel on the hh.ru site.

There was an update posted today. I ran the update this morning. Now Firefox will not open.

error platform version 127.0.1 not compatible with miniversion >= 127.0

                                                                                  miniversion <= 127.0

Running Windows 10 Version 10.0.19045 Build 19045 64 bit Should I remove and reload program?

For the past couple of weeks I have been getting the "Hmmm, We're having trouble finding that site" error screen quite often from both searches and links from other sites. It's always happened once in a while but it hasn't been anything bothersome. However recently it has become quite bothersome because it's happening a lot! However not all the time. It's not completely broken, just mostly. And it's happening while trying to visit sites that I know and visit frequently such as Amazon, Ebay, and even sites for local businesses that I trust and know are working. I'm not having any internet issues with my home wifi, nor am I having this issue with other browsers. I have however also noticed it on my Firefox mobile browser as well. I posted about this a few days ago and got some email back about an issue with my post. If this happens with this one and I'm unable to get this resolved I will just get rid of Firefox on my devices. FF has been a long time favorite and is usually set as my default browser but if stuff like this is going to continue, I can change that real fast. There are plenty of other browsers that work just fine and have decent customer support.

For about the last 5 days I am not able to use Google Search on my MacBook Air using Firefox. My start page is Earthlink. I keep getting this error message ( Application error ; a client side-exception has. occurred ( see the browser console for more information ). My email is west47916@earthlink.net. Could the problem be Earthlink or Firefox.

Hi. Every page I visit I get at least one message popping up with the URL at the top, the message body of "1" and the option for OK. Many pages have multiple prompts for what looks like advertising sites (based on the URLs). Sometimes I get the option to check a box saying "don't allow URL to prompt you again"

Example message for when I go to google: https://imgur.com/a/RBd4mS3

I guess it might be some sort of debugging mode? I tried uninstalling and reinstalling Firefox and it still happens. I am on latest versions: Firefox 127.0.2 on a MacBook Pro (2019) with MacOS Sonoma v14.5.

Can you please help me to remove these prompts? It makes Firefox pretty much impossible to use due to multiple clicks per page load. I've tried searching for help pages but it's very hard to explain the problem to a search engine! Human needed! :)

I am using Windows 11 and FF 127.02. I have read the lag issue with Youtube was suppose to be corrected with FF 127.02 but it is not. I have been using FF for many years now an love it. It is my understanding that it is the ad blockers causing the slow down. Do you have an estimated date when this will be resolved. I have tried every trick included running it in diagnostic mode or trouble shooting mode. Nothing seems to work. Not even a refresh.

Thanks

I've been out of town. After returning home Firefox updated to 127.0.2 but now it will not close its process when I close its window. When I try to launch Firefox again I get the error message below and attached:

"Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window. <Close Firefox> <Cancel>"

When I select "Close Firefox" the new Firefox window will then launch. However, if I open any web page the same error occurs after closing the window.

If I launch Firefox and then close it without opening a web page I do not get the error the next time I launch. Somehow going to any web page in Firefox prevents that instance of Firefox from closing.

I'm running Windows 10 22H2 Build 19045.4529 and it's shown as up-to-date.

I can't download anything by that green download button (Youtube). I just receive error messages, see attachment. I have read their FAQ and I have latest versions of Firefox and savefrom.net helper.

Almost daily I get a message to download or dismiss update. When I dismiss the message, it continues to pop up. When I hit download, nothing happens. This is locking up my computer at times & slowing everything down. I actually don't see the need for daily updates. What is causing this and how can I stop it?

First, I fully realize that my OS is prehistoric - beyond ancient. I simply cannot afford to upgrade right now - I'm working on it, though. So, since the last update on ESR, everything seems to be working well, browser-wise, except for a sudden change when using FB. They're problematic, so I thought it was something there, but there are no problems with any of my other devices ( 2 phones & an ipad). For most situations on FB, without going into the whys, I need to use my/a laptop, instead of anything else. It has begun freezing and lagging -sometimes, for 10 minutes - after I start typing! And, the emoji panel takes that long to appear, then longer after hitting one! It's basically unusable. I already contacted them, and as previously mentioned, the laptop is the only problem after the last update, the other devices work well, in terms of speed. I'm wondering if there's anything I can do here to remedy this. I have 9 billion bookmarks and my settings are set in stone, so I can't risk losing any of that by reinstalling, or anything like that. I've been with Firefox since it became available, many years ago, so I'm not willing to sacrifice anything I've collected. All was fine, until this last update. And, I'm working on getting another laptop. Thank you for your time.

At some point about 5 days ago, Firefox began to load YouTube videos unacceptably slowly. To begin a video it may take around 30 seconds or more to load (with a black screen and circular loading bar/graphic), and randomly throughout the video it will need to load again which has taken up to 5 minutes at times.

Steps I have taken: - ran Firefox in troubleshooting mode (issue persisted with no extensions) - minimized memory usage - disabled hardware acceleration - refreshed Firefox twice - reinstalled Firefox

Testing/comparing YouTube in Chrome and Edge, videos load near instantaneously (even while running an extension such as uBlock Origin), and I can click anywhere in the duration of the video and it loads in less than a second. Strangely, sometimes the issue doesn't persist for the next 2-3 videos that I try to play, but then goes right back to an extremely long load time for the next video. I've never had such an issue with Firefox before and cannot find a solution. Extensions don't appear to be an issue and other browsers run YouTube perfecty fine.

For about a couple of weeks, there has been a lot of delay between what I type and when it actually appears. It's maddening! I have not changed any of my Firefox settings. I did a 'refresh' about an hour ago. I am not seeing any network activity that I cannot recognize. I d/l'd 'Malwarebytes' and ran it..."no threats". MS Defender has always been on & protecting me. I have never had this situation occur before and am hoping for some help (5 to 10 seconds to wait for what you've keyed in is not fun).

Even though I actually have only 1, 2, or 3 Firefox windows actually open, subsequent browsing is is stacking up instances. Following is a copy of Windows' "processes screen" illustrating an actual instance. At this point, I run out of memory and Firefox crashes.

tl Firefox (15) 7.0% 1,133.1 MB 0.1 m/s 0 Mbps i£, Firefox Efficiency... 0% 398.5 MB o m/s 0 Mbps Firefox 1.7% 268.3 MB o.i m/s 0 Mbps Firefox 3.6% 174.8 MB o.i m/s 0 Mbps Firefox 0.8% 120.8 MB o m/s 0 Mbps Firefox Efficiency... 0.8% 48.3 MB o m/s 0 Mbps Firefox Efficiency... 0% 36.3 MB o m/s 0 Mbps Firefox Efficiency... 0% 30.7 MB o m/s 0 Mbps Firefox 0% 20.3 MB o m/s 0 Mbps Firefox Efficiency... 0% 17.6 MB o m/s 0 Mbps Firefox Efficiency... © 0% 8.4 MB o m/s 0 Mbps Firefox Efficiency... © 0% 5.3 MB o m/s 0 Mbps Firefox 0% 1.8 MB o m/s 0 Mbps Firefox 0% 0.8 MB o m/s 0 Mbps i£. Firefox 0% 0.8 MB 0 MB/s 0 Mbps Firefox 0% 0.5 MB o m/s 0 Mbps

A few days ago I tried to download something from a modding website for a game, and the download simply failed instantly. I thought it might have been an issue with that website, but after pressing on with my plans with Edge and later trying to download Microsoft Visual Studio through Firefox, it failed again.

A week or two prior downloads were working fine, and I hadn't changed any Firefox settings between now and then. There's clearly something blocking downloads, but I don't know what. I'm not adept enough at fiddling with individual settings all day to know what they do or figure it out easily. All I know is that pretty much all of the conventional solutions from the most recent posts about this (2+ years ago) are not working. I've tried messing around in about:config and about:profiles, tried disabling and unchecking Firefox security settings, and changing the directory for downloaded files. I've even tried disabling Windows Firewall and Nord VPN.