Unable to remove Google Chrome extensions

Maybe you have synchronized your Google Chrome with instances of Google Chrome on other devices, and in addition to synchronizing your bookmarks, you have inadvertently selected to sync your extensions as well. So the first time you open Google Chrome on a new day, Chrome searches for the master device's data to sync to, and then restores your extensions by syncing the data on your computer with the data from the master device.

Check your sync settings to see if they are correct. Chrome menu ⋮ -> Settings -> People . If you are syncing your extensions, you can change it from there.