How to disallow extensions outside Firefox profile directory

Question

Some softwares like Kaspersky Internet Security, AVG, JRE and many others install their firefox add-on outside my profile directory and I cannot uninstall it, only disable it. And when I try to create another profile, they still here and I have to disable it again

So, is there any way to disallow extensions outside Firefox profile directory? Registry hacks or Environment variables? Many thanks

EDIT: I want to ask about disallow Window registry extensions http://kb.mozillazine.org/Uninstalling_add-ons#Windows_Registry_extension

Answer 1

You might try installing FF and then denying access on the installation "extensions" directory for creating a new file to the group "Everyone".

For the registry installed extensions, you should be able to deny access to the registry path/key. This is easily done with regedit - locate the registry entity you want to change and use the context menu to change permissions on it. Be very careful; changing the registry in the wrong way can prevent your system from booting. Make careful note of what you do and have a recovery disk with regedit handy just in case.