Google chrome extensions gallery has been released recently, but one thing which I am not liking about the google chrome addons is that they keep occupying the space and making the address bar in google chrome shorter in width but there is no solution to this now. But at least after installing an extension you may want to remove it, you will get some space.
Here is how you can disable or remove an extension in google chrome
1. Open google chrome, go to settings >> extensions [ as shown in the image below ]
2. This will open up the google chrome extensions page, from where you can disable or uninstall any extensions installed in google chrome. [ as highlighted in the image below ]