Firefox 22.214.171.124 is the fourth security update to the 1.5 edition of the browser since it released last November. The number of holes plugged in 126.96.36.199, however, is only half that of April's mega-patch, when 24 total, 11 of them "critical," were fixed.
Danish vulnerability tracker Secunia tagged the update with a "highly critical" rating, it's second highest ranking.
A list of the bugs patched by 188.8.131.52 can be found on the Mozilla Foundation's Web site.
Mozilla also patched its Thunderbird e-mail client, fixing 8 flaws by releasing version 184.108.40.206; meanwhile, the separate SeaMonkey project rolled out its 1.0.2 version, the follow-up to the now-defunct Mozilla browsing suite, and fixed a long list of bugs.
This is the second update of Firefox since Mozilla announced it was ending support for the older Firefox 1.x line.
Firefox and Thunderbird can be downloaded from the Mozilla Corp. site, while SeaMonkey can be found here. Users of Firefox and Thunderbird 1.5.x, however, can wait for those programs' automatic update functions to kick in and retrieve the smaller-sized update files.