[Bug 666910] Re: Can not install addons

[RedSingularity]

Looks like your using an outdated version of firefox for 10.10.  Close
firefox and other applications, perform a system upgrade.

sudo apt-get update
sudo apt-get upgrade

Reboot the machine (to be safe) and then try firefox again.

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Can not install addons
https://bugs.launchpad.net/bugs/666910
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