I want to change the icons of some extensions I've installed.
I have looked in Chrome's
AppData folder, but I just found some
Where does Chrome locally store extension icons?
Google Chrome extensions are stored in
The icons of the extensions should be inside the extensions' folders (the names for the folders aren't readable, so you need to go one by one or search the name of the extension to get to its folder):
Converting @Lamb's comment to an answer:
Lifehacker has a tutorial here.
The extension files can be found in:
Find the ID of the extension you want to change, by searching the name you want in the Chrome Web Store, then clicking on it.
The ID will be in the URL:
Switch back to Explorer, and enter the folder that matches the extension's ID.
The mainifest.json file will list the extension's icon files. You can replace those.