Extension for Firefox

[Thin Ice]

I'm trying to download and install an extension to my Firefox browser and I keep getting "Software installation is currently disabled. Click Edit Options...to enable it and try again." message every time I click the Install Now button. When I click the Ed Op button the Options menu opens to the Content tab. Java is enabled, as is Javascript, and addons.mozilla.org and update.mozilla.org are allowed to install software. I can download files from other sites so what am I overlooking?

[Duckster]

I can download files from other sites so what am I overlooking?

Firefox extensions have their own download process. What is the URL of the extension you are attempting to download?

[Nanoda]

Have you had Firefox installed since before version 1.5? If so, this link (http://kb.mozillazine.org/Unable_to_install_themes_or_extensions_(Firefox)) may help you. (requires setting option xpinstall.enabled to true).

[Thin Ice]

Thanks to both of you for your replies. Nanoda, the info you provided did the trick. I did update to 1.5 from an earlier version so that was the problem. Thanks again.