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I have Firefox version 0.9.1 and extensions will not install. I go to
Tools >Extensions >Get more extensions and it takes me to the Mozilla.org
extensions update page.

For instance, I click on Adblock, and that opens a page with an "INSTALL
NOW" button. I click and nothing happens. No install, nothing new in any
menu either, nothing. No extensions will install at all. And my Java and
Javascript is on.

I right click to download the .xpi file, and drag it onto my Firefox
browser window and nothing. I drag the file into the Extensions dialogue
box also (Tools >Extensions) and nothing.

Do I have to update to version 1.0? Adblock shows for version 0.7+ to
1.0, so that shouldn't be the case. I must be missing something.

Any help would be appreciated.

Thanks.
a Firefox fan

Nevermind, I found out I did not have "Allow websites to install
software". Fixed it.