To set up the workaround, type into the address bar (where you would usually enter a URL) the string:
Note there are no spaces. You will then get a slightly tongue-in-cheek dialog box that says “This might void your warranty”. Click on the button that says “I’ll be careful, I promise!”. This will bring up a very long list of options, with a search box at the top of the list. Type the string ‘jit’ into the search box; you should then have the list narrowed down to two options. Locate the line that looks like this:
I’ve been running with the workaround in place for a couple of hours, and haven’t seen any real problems so far.
Update, Tuesday, July 14, 16:40
The existence of the problem, and the temporary workaround, have now been confirmed by an entry on the Mozilla Security Blog. A more permanent fix is in the works.
[…] Security Advisories page has now been updated, and it shows that the JIT bug that I wrote about a couple of days ago has been fixed. Well done to the Mozilla folks for their quick response. Possibly related […]