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Wannan tattunawa ta zama daɗaɗɗiya. Yi sabuwar tambaya idan ka na bukatar taimako.

when prompted by FF I downloaded the 3.6.6 update, but FF refuses to install it when i restart it

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I'm running FF 3.6.4 with Windows Vista Home Premium. When prompted to download FF 3.6.6 I did, but when I restart FF it refuses to install FF 3.6.6, saying it cannot until I quit FF. But this happens even when I restart Windows, i.e. when FF is definitely not running.

This happened

Every time Firefox opened

== I downloaded FF 3.6.6 from within FF 3.6.4, using check for updates.

I'm running FF 3.6.4 with Windows Vista Home Premium. When prompted to download FF 3.6.6 I did, but when I restart FF it refuses to install FF 3.6.6, saying it cannot until I quit FF. But this happens even when I restart Windows, i.e. when FF is definitely not running. == This happened == Every time Firefox opened == I downloaded FF 3.6.6 from within FF 3.6.4, using check for updates.

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What you can do is download the latest version here. Install it as normal. Your problem should be fix.