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I am getting the following Alert message and will not let me log into certian sites?

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I am getting the following message when I try to certain sites I log into, this just started hapening! I am using a Mac with the current version of 3.6 here is the Alert I get :::: Firefox doesn't know how to open this address, because the protocol (javascript) isn't associated with any program.

This just started happening! I am using a Mac with the current version of 3.6

I am getting the following message when I try to certain sites I log into, this just started hapening! I am using a Mac with the current version of 3.6 here is the Alert I get :::: Firefox doesn't know how to open this address, because the protocol (javascript) isn't associated with any program. This just started happening! I am using a Mac with the current version of 3.6