# Firefox extension won't install **URL:** \ **Category:** Factual Questions\ **Created:** [March 14, 2006, 11:53pm UTC](https://boards.straightdope.com/t/firefox-extension-wont-install/348385 "2006-03-14T23:53:46Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Lsura](https://avatars.discourse-cdn.com/v4/letter/l/7993a0/32.png) [@Lsura](https://boards.straightdope.com/u/Lsura)\ **Post date:** [March 14, 2006, 11:53pm UTC](https://boards.straightdope.com/t/firefox-extension-wont-install/348385/1 "2006-03-14T23:53:46Z")
I checked the “have a computer question” thread, and I searched here but can’t find an answer. I also checked the Firefox home page, but since I don’t understand what it’s telling me to do…I figured I’d ask. I’m trying to install the [del.icio.us](http://del.icio.us) extension for Firefox at home - it installed fine at work once I allowed the site. I get the message that installation isn’t allowed, and I followed the instructions, but still no go. I tried getting it from the Firefox extensions page at [addons.mozilla.org](http://addons.mozilla.org), but it still won’t install and I just keep getting the yellow bar telling me that I can’t install. I’m using Firefox 1.5, and when I looked for help at the mozilla page, I found this: > [@](#): > > Software installation is enabled by default. In Firefox versions 1.0.7 and earlier (and Thunderbird) there is a preference in the options menu to enable or disable software installation. > > In Firefox 1.5 this preference still exists, but it is now accessed through about:config. Find xpinstall.enabled and set it to true by double clicking on it or by right clicking and choosing reset. Problem is, I don’t know where to find about:config or xpinstall.enabled - help? ---
**Author:** ![Twoflower](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/twoflower/32/22_2.png) [@Twoflower](https://boards.straightdope.com/u/Twoflower)\ **Post date:** [March 15, 2006, 12:07am UTC](https://boards.straightdope.com/t/firefox-extension-wont-install/348385/2 "2006-03-15T00:07:09Z")
just type " about:config" in the address bar … you’l get a long list of configuration options … they’re alphabetized, so scroll way down to find xpinstall.enabled ---
**Author:** ![633squadron](https://avatars.discourse-cdn.com/v4/letter/6/ee59a6/32.png) [@633squadron](https://boards.straightdope.com/u/633squadron)\ **Post date:** [March 15, 2006, 12:07am UTC](https://boards.straightdope.com/t/firefox-extension-wont-install/348385/3 "2006-03-15T00:07:17Z")
> [@Lsura](#): > > I checked the “have a computer question” thread, and I searched here but can’t find an answer. I also checked the Firefox home page, but since I don’t understand what it’s telling me to do…I figured I’d ask. [ol] [li]When you try to install, what **exact** error message do you get. Cut and Paste if necessary, or write it down.[/li][li]about:config you get by typing “about:config” in the address bar and clicking “go”.[/li][/ol] But I doubt that install is disabled. To give you more help, I _need to know the exact error you’re seeing._ ---
**Author:** ![Lsura](https://avatars.discourse-cdn.com/v4/letter/l/7993a0/32.png) [@Lsura](https://boards.straightdope.com/u/Lsura)\ **Post date:** [March 15, 2006, 12:51am UTC](https://boards.straightdope.com/t/firefox-extension-wont-install/348385/4 "2006-03-15T00:51:47Z")
> [@633squadron](#): > > [list=1] > But I doubt that install is disabled. To give you more help, I _need to know the exact error you’re seeing._ I don’t see an error, but a normal dialog bar - the yellow bar at the top of my Firefox window that tells me that installations are disabled and to use edit options to change it. But I go there, add the page from which I want to install and it still doesn’t work - I just get the same yellow bar again, whether I restart Firefox or not. Thanks for letting me know how to get to about:config. I got that reset and the install worked.