There were a couple of problems with Firefox 51 that prompted Mozilla to push out another new version yesterday. Firefox 51.0.1 resolves the two problems, one of which was related to the new multiprocess features.
Firefox itself seems to take a few days to notice new versions. Click the ‘hamburger’ menu button at the top right, then click the question mark icon, then click ‘About Firefox’ to see the version you’re running. In my experience, Firefox will usually say ‘Firefox is up to date’ until a couple of days after a new release becomes available. This is potentially confusing, but Mozilla doesn’t seem to understand that.
If you don’t want to wait for Firefox to notice the new version, you’ll have to download it directly from Mozilla.
The latest version of Firefox addresses at least twenty-four security vulnerabilities and changes the way non-encrypted sites appear in the address bar.
As usual, there’s nothing like a proper announcement for Firefox 51. What we get from Mozilla instead is a blog post that discusses some new features in Firefox, and mentions the new version number almost accidentally in the third paragraph. Once again, CERT does a better job of announcing the new version than Mozilla.
Starting with version 51, Firefox will flag sites that are not secured with HTTPS if they prompt for user passwords. Secure sites will show a green lock at the left end of the address bar as before, but sites that are not secure will show a grey lock with a red line through it. Previously, non-encrypted sites showed no lock icon at all. The idea is to draw the user’s attention to the fact that they are browsing without the security of encryption, which is risky when sensitive information (passwords, credit card numbers) is entered by the user.
The latest version of Firefox fixes at least thirteen security vulnerabilities. The release notes for Firefox 50.1 don’t provide much detail, but the related security vulnerabilities page at least lists the issues.
It almost goes without saying that there was no proper announcement from Mozilla for this new version, despite the fact that it includes fixes for critical security issues.
If you’re a Firefox user, you might want to think about using a different browser for the next day or so. Researchers have discovered a critical vulnerability that has yet to be patched. Mozilla is working on a fix but there’s no word on when it will be available.
Ars Technica has more.
Update 2016Nov30: Mozilla just released Firefox 50.0.2, which includes a fix for this vulnerability. Mozilla posted about this as well.
There’s a critical security vulnerability in Firefox 49 and 50, and Mozilla just released Firefox 50.0.1 to address it. Which is great, except for one thing: the total lack of anything resembling an announcement.
Yes, Firefox can be configured to update itself or alert you when an update is available, but that setting can also be disabled completely. Worse, it can take days for Firefox’s internal update checker to detect that there’s a new version.
I discovered the new version by way of a post on the US-CERT site.