I have a typical installation of Google Chrome on my personal Windows 7 PC. I have never had trouble with automatic updates.
This evening I noticed some new behavior, so I went to the "About" page and saw some unusual information. The latest version is listed as
38.0.2125.111 dev-m and there was additionally a message that said "Updates have been disabled by administrator". (I have full administrator access and I have never disabled updates).
Based on some searching, I fixed the "disabled updates" issue by changing the value of "UpdateDefault" from 0 to 1 in the registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update. My About Page currently says "Google Chrome is up-to-date" again.
However, I'm curious about the "dev-m" part of the version number. I have never installed Chrome Canary or anything like that. Is "dev-m" supposed to be part of the version number in the stable normal release? If not, how did I get onto the dev-m update path and how do I get off of it?
Fuller explanation of symptoms:
I returned to my desk to find that Chrome was open with all of my typical tabs open, as well as the settings page for an Extension (which I foolishly closed before remembering which one it was). I did not think much of this, assuming that I had forgotten to close the browser earlier.
I closed Chrome and re-opened it and noticed that instead of the "head icons" in the upper left to switch profiles, there was a "name dropdown" on the upper right with different behavior. I also noticed that google.com was listening for "OK, Google" from my microphone which also was a new feature. This is why I went to look at the version number in the first place.
Upon reinstalling the stable version (see comments and my own answer), these 2 features were reverted.
I also noticed just now that one of my extensions -- "Notes for Gmail" -- has been automatically disabled by Chrome saying it may be infected by malware. This could possibly be related to my installation of Chrome getting screwed up.
Nobody has had physical access to this PC/browser in the last 48 hours other than myself.
UPDATE: This happened again, without explanation, a few weeks later! I closed the browser (running "stable" that I had reinstalled after asking this question), and reopened the browser a few minutes later without leaving my desk and it was suddenly showing up as the dev-m version. I had to shut down Chrome completely, reinstall the 'stable' branch from the website, and change the registry entry to reenable automatic updates.
Any clue as to what is going on?