Security News > 2023 > August > Firefox fixes a flurry of flaws in the first of two releases this month
The latest full new version of Firefox is out, marking the first of two "Monthly" upgrades you'll see this month.
Firefox version upgrades happen every 28 days, rather than once a month, so whenever a release comes out early enough in the month, there will be a second upgrade squeezed in at the end.
Firefox ESR 115.1 if you are a user of the Extended Support Release, which includes security patches but doesn't add new features.
Thunderbird 115.1 if you use Mozilla's email software, which includes the Firefox web browsing code for rendering HTML emails and viewing emailed web links.
Head to Firefox -> About Firefox if you have a Mac, or Help -> About Firefox on other platforms.
Dont forget, if you use one of the BSDs or a Linux distro, that your Firefox release might be managed by the distro itself, so check with your provider for updates.