Unable to install themes or extensions : Unexpected installation error Review the Error Console log for more details -203Pritesh
Unable to install themes or extensions :
Error Description :
Some times ago i was facing this issue with Mozilla Firefox. I was unable to install any add-on,plugin and theme. I was getting this above message while installing firebug in Firefox. During Installation of .xps file i was getting this -204 error after finishing 98% of installation.
Resolving this issue is not a big deal. You need to follow 3-4 simple steps.
- Firstly Close all the instances of Mozilla Firefox.
- Restart Mozilla Firefox and then go to Help–>Troubleshooting Information
- Click on “Open Containing Folder” Button (Profile Directory).
- Now inside Folder Delete Following 4 Files –