Mozilla has issued an update for its Firefox web browser.
The company said the Firefox 3.6.13 update would include fixes for 11 vulnerabilities in the popular open-source web browser.
Among the fixes are nine issues which the company has classified as posing a critical threat to users.
Included in the nine critical patches are fixes for buffer and integer overflow vulnerabilities as well as a flaw which could allow an attacker to bypass Java security components.
Also addressed is an update for an incomplete fix on a patch that the company has released before.
The two remaining patches include an SSL spoofing flaw listed as a high security priority and a cross-site-scripting vulnerability rated by Mozilla as a moderate threat.
Administrators are being advised to review and install the update where it is applicable.
The Firefox patch comes in the wake of a security and performance update from Google for its Chrome browser.
Next week Microsoft is expected to issue no fewer than 17 bulletins for Windows and Office with its monthly patch release.
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