I am starting to suspect it is a problem with windows versus a problem with Firefox because of an earlier bug where I couldn't move the windows entirely without enabling the Snap Windows function in my settings.

By this I meant I couldn't move the entire Firefox window without enabling the Snap Windows function.

You can't even move tabs left and right along the tab bar? That's definitely not normal. If you switch the window between resizable and maximized, does it work any better in the other condition?

I'm having the same problem in Windows 10 with the Firefox browser. I can NO LONGER MOVE any of my tabs (left, right) and the only way to move tabs now is to use the right click drop down to move a tab all the way to the left end or right end. This started back in September or October of 2025 after either a Firefox update &/or a Microsoft Windows 10 update.

I'm having the same problem in Windows 10 with the Firefox browser. I can NO LONGER MOVE any of my tabs (left, right) and the only way to move tabs now is to use the right click drop down to move a tab all the way to the left end or right end. This started back in September or October of 2025 after either a Firefox update &/or a Microsoft Windows 10 update.

There was a bug involving a tab getting stuck during a move and controls on the main toolbar being mostly inaccessible. Are you seeing the toolbar issue, or is it only stuck tabs? Any difference if you switch the window between maximized and resizable?

Having the same issue here. Thought it was sidebery (extension), tampermonkey (extension) or userChrome.css interfering. I refreshed FF, and disabled those 2 extensions and made sure userChrome.css was gone. `browser.tabs.allowTabDetach` was already set to true.

It started for me a few months ago, and seemed to usually only happen after FF was running for 30+ min. Now it does it within about 10 min of restarting it. Behavior:

• Can't drag native tabs nor tabs in sidebery
  • In sidebery I usually see a ghost drag indicator somewhere in the list (the `>---------------` that appears for where you're going to drop the tab)
  • Can't drag to a new window, but this is likely just the fact I can't drag tabs at all.
• Clicking ON the tab does switch to it
• X doesn't close tabs (both native and sidebery)
• UI elements like hamburger menu, extensions button, etc do not respond.
• Keyboard shortcuts continue to work
• Pages in the tabs continue to work fine
• Mostly when changing focus back to FF, but sometimes completely randomly it will switch to what feels like a random tab. It's just like I clicked on it.

I'm on Ubuntu 24.04. Below is the FF basic information: ``` Name Firefox Version 147.0.1 Build ID 20260116091309 Distribution ID canonical User Agent Mozilla/5.0 (X11; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0 OS Linux 6.16.7-061607-generic #202509111546 SMP PREEMPT_DYNAMIC Thu Sep 11 18:03:23 UTC 2025 OS Theme Breeze / Adwaita Application Binary /usr/lib/firefox/firefox Profile Directory <redacted> Build Configuration about:buildconfig Memory Use about:memory Performance about:processes Registered Service Workers about:serviceworkers Multiprocess Windows 1/1 Fission Windows 1/1 Enabled by default Remote Processes 12 Enterprise Policies Active Google Location Service Key Found Google Safebrowsing Key Found Mozilla Location Service Key Missing Safe Mode false Memory Size (RAM) 30.6 GB Disk Space Available 817 GB Profiles about:profiles ```