599678 - When typing 'm' as the first letter in the location bar, firefox changes it to a 'h'

Status: RESOLVED DUPLICATE of bug 559878

(Firefox :: Address Bar, defect)

Description

[john.jd.doe]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b6) Gecko/20100101 Firefox/4.0b6
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b6) Gecko/20100101 Firefox/4.0b6

A very strange bug, but surprisingly annoying. When typing 'm' as the first letter in the location bar, for some reason firefox automatically replaces it with a 'h'. It makes it rather difficult to open any website starting with an 'm'.

Reproducible: Always

Steps to Reproduce:
1.Empty/Delete any text in the location bar.
2.Type 'm'.
Actual Results:  
The location bar text changes to a 'h' in a fraction of a second.

Expected Results:  
The location bar text stays an 'm'.

Comment 1

[john.jd.doe]

Update: It seems to have something to do with the Firefox Beta 'switch to tab' feature.

When I have only a new tab page open and nothing else, the bug does not occur. If instead I have a ftp site open, e.g. ftp://ftp.mozilla.org/pub/mozilla.org/firefox/, the 'm' is automatically replaced by a 'f'. If a http site is open, then the 'm' changes to a 'h'.

Comment 2

[Tyler Downer [He/Him]]

WFM with Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100925 Firefox/4.0b7pre. Does this happen in a fresh profile? http://support.mozilla.com/en-US/kb/managing+profiles.

Comment 3

[john.jd.doe]

Update2: It also only happens when browser.urlbar.autoFill is set to true in about:config, so I guess the answer to Tyler's question is that it would not happen in a fresh profile.

It autofills the URL of another open tab when 'm' is pressed - see screenshot at https://docs.google.com/uc?id=0B7a19H7tp-nWM2QwZjQwODQtMTUwNi00MjgxLThjOWMtMzZhZjk2ZTA5NzNh&export=download&hl=en for clarification.

Comment 4

[Drew Willcoxon :adw]

Thanks for filing the bug.  It's a known issue:

Comment 5

[john.jd.doe]

Thanks Drew. I searched for duplicates before posting, but didn't think of searching again after finding out that it depended on browser.urlbar.autoFill.