User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 If I remove search engines, they come back when I update firefox. Reproducible: Always Steps to Reproduce: 1. Remove useless search engines like Yahoo or Answers.com 2. Update Firefox 3. profit Actual Results: Useless search engines come back. Expected Results: Useless search engines should not come back.

Can't find an existing bug covering this for firefox 1.5.0.x, but for firefox 2.0 the search engine part of firefox is going to be more advanced, and will solve this problem.

Related to bug 308957 or bug 300738 comment 8?

Search Plugins should be stored in the profile (fixed by bug 123315), so that they won't get nuked during an upgrade. I think the default ones are still installed in the application directory. Bug 232272 is supposed to fix most issues.

For Firefox 2, shipped search engines will be able to be removed (actually hidden) in such a way that they are not re-added upon upgrade.

Fixed in bug 232272.