If you see any activity on the browser that has these show up/ key words that might point to these issue then the following solution may help.
Keywords for people to find this answer/ solution:
The Extension "Tab Manager" was sold to a malicious 3rd party and users were not notified in any fashion by the original dev.
On the github source code page he pointed to a new entry for the Extension, which most users dont have any way of being notified or knowing. For this, users need to delete and remove the old extension and if they want they can install from the new link.
https://github.com/VanCoding/Tab-Manager - Readme.md
This is a Google Chrome extension which allows you to easily and
quickly manage and access your tabs/windows ;) Have fun with it!
IMPORTANT: The old "Tab Manager"-entry in the chrome web store has
been sold and I am no longer the owner! Neither do I know the source
code of the version that currently gets deployed there.
Please note that only the web store entry and no source code has been
sold. I, and all contributors of the project, are still the owners of
the source code. I've also created a new entry on the chrome web
store. I'll keep it up to date with the source code as with the old
But, I still wonder what could we people / users do in future to keep track of such "handovers/ sellouts" and take steps.
Discussed here as well: https://productforums.google.com/forum/#!topic/chrome/Znvs228EVc8
Specifics of the malicious code are available here:
Consequently after being criticized for introducing such activities into an open source project, the original author/ dev just made a bait/ switch on the open source project and high tailed out after his open source project turned sold into Malware, with prospective infections of 1,43,000 (based on downloads/ installs of original extension from Chrome Store). Finally, after arguing his stance he just removed/ deleted the open source project repository from GitHub.
Hochdorf LU CH
Joined on Feb 2, 2011
His final comments & activities on the subject from screenshot attached: