I've been using 1Password with Internet Explorer and Google Chrome perfectly fine.
However, I cannot get the plugin to install into Firefox at all. I've even removed/reinstalled (and upgraded) FireFox as well as 1Password but I still get the following message:
Firefox (profile name: default) is running.
We cannot install our Firefox add-on while Firefox is running.
Please close the existing Firefox process, and try again.
There is no FireFox processes running that I can see, so what is going on? Can I force the plugin to install anyways?