User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:2.0b1) Gecko/20100630 Firefox/4.0b1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:2.0b1) Gecko/20100630 Firefox/4.0b1 I have the browser.urlbar.autoFill configuration set to true. If I have a tab open that already shows a page from say http://www.asmcommunity.net/ And I try to open a new tab and type in the first letter 'm' of 'mozilla.org' to visit mozilla.org, the autofill fails and the letter 'm' is eaten up. I have uploaded a screencast showing the problem: http://www.screencast.com/users/yesudeep/folders/Jing/media/72b32bff-c2f4-433f-a3c6-407a55e05b2d Reproducible: Always Steps to Reproduce: 1. Enable browser.urlbar.autoFill in about:config 2. Open http://www.asmcommunity.net/ in a tab. 3. Open a new tab and type 'm'. Actual Results: The letter 'm' is eaten and replaced with "http://www.asmcommunity.net/" Expected Results: m should not be eaten up and switch to tab should not be the default choice. shown me completions for m-> shown switch to tab http://www.asmcommunity.net/ as the first item in the suggestion list.

Notice also that everything but the first "h" is selected.