Unable to install firefox add-ons

[Christopher Aillon]

Gianluca Sforna wrote:
> Am I the only one unable to install firefox add-ons with
> firefox-1.5.0.10-5.fc6 ?
> For example, trying to install this:
> 
> https://addons.mozilla.org/firefox/60/
> 
> I get: Software installation is currently disabled. Click Edit
> Options... to enable it and try again.
> 

It should be registering as an extension, not "software" which is 
reserved for the firefox application itself.  Software updating is 
disabled because we use yum/rpm for installing and updating firefox.  Do 
other extensions work properly?