New versions of Firefox create as many problems as it resolves.
I have read of some problems with v23 or whatever that latest is.
I primarily run v15, because later versions conflicted with Adobe Flash and would not download PDF files. Many of the extensions don’t work with later versions and many developers gave up trying to keep up.
Mozilla has taken a good browser and basically wrecked it with their rapid release insanity.
I have used Maxthon in the past and I use it now for job hunting. I use IE for logging into government websites (since I am a federal employee I can use a common access card at home) and into FB to chat with family, and Firefox for everything else.
What else is out there except for Safari and Opera?
Just as many of the addons merely say they don’t. We have a few that refused to work til we edited the file to not forcibly stop working merely because of the version, and they fine after that was done.