0 to disable the experimental address bar and tried that but Terminal reported 'No such file or directory. I saw the blog post by Ruarí Ødegaard about the workaround for. So I tried uninstalling again and reinstalled.

But on reinstalling, the same problem occurred.

Google are dropping support for OS X versions before 10.9 from April of. 40 because I think this version had previously run ok. You can currently use Chrome, the worlds most popular browser, but not for long. I suspected a clash between my OS (10.7.5) and the latest update (.48) so I uninstalled that, and reinstalled. Dbl click on the file and it should put up both a disk drive looking image and a pop up installation window. Dbl click to download, locate the Firefox 45.9 ESR.dmg on your Mac. When it does appear to respond to the 'quit' command, I've noticed that for a long time after disappearing (nearly a minute?), its processes are still active and are using all my RAM despite the window having disappeared from the screen. This is a more recent, more secure web browser for OS X 10.7. Sometimes it won't quit and I need to force quit. For example, at least a minute to load up, and sometimes it never loads up. Since about a week ago, Opera has run slower and slower, and as of the other night, Opera has been running so slowly I've been unable to use it.

Browsers for mac 10.7.5