Mozilla came yesterday with the new update to Firefox 3.0 and 3.5. In most cases, users will automatically be notified that updates are available within 24 to 48 hours, but it is also possible to download the updates manually via this page.
Except for one vulnerability that only exists in Firefox 3.5.3 and older, is it the same vulnerabilities as removed with updates 3.0.15 and 3.5.4.
In all, we are talking about 11 different issues, of which six are considered to be critical. This means that they may potentially be exploited by malicious people to execute arbitrary code on the system.
An overview of all vulnerabilities found on this page. The vulnerability is "MFSA 2009-54" is the one that applies only to Firefox 3.5.x. It is related to the "web worker" functionality that was introduced with Firefox 3.5.
Both updates also include several stability improvements. It is also directed a number of other errors in Firefox 3.5.x.
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