multi-user installation

[james.latham]

Is it possible to install NoScript once on a multi-user computer such that all users have it available to them?

[dhouwn]

Yes, through 'global installation', ie. it is installed into the Firefox folder instead of the profile folder. The settings will still be per-user though.

[james.latham]

How does one select where to install it?

[anon user]

http://kb.mozillazine.org/Installing_ex ... stallation

Short answer: copy the downloaded .xpi into the Firefox directory's 'extensions' folder *when you are absolutely sure that Firefox isn't running*. Follow the prompts from Firefox when you next start Firefox.