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31 Mar
2018
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[Solved] Can’t open Firefox because a copy of Firefox is already open mac

Following steps would resolve your issue of firefox not loading due to error message that a copy of Firefox is already opened. In OS X Terminal, open terminal and copy paste the following command $ cd ~/Library/Application\ Support/Firefox/Profiles/ $ ls -l This will list the profiles you have in firefox. if you have multiple profiles, […]

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