I often hop between Linux distro installations, and I generally use the same hostname for a single computer when I do reinstalls. I have had a computer called 'sparrow' that I've signed into Firefox several times on across OS changes, and they all appear in the 'Send Tab to Device' menu that I use frequently. Since none of these devices exist anymore, they're completely useless. I've gone to the Manage Devices page where you can sign out of any devices that are currently logged into my Firefox account, but clicking sign out on 'sparrow' does nothing. It stays in the menu, and no entries from the tabs menu are removed. I've tried this from all my computers. I've thought of maybe downloading all my firefox sync data and completely recreating my Firefox account, but I'm hoping there might be a simpler fix. Any help would be greatly appreciated!