How do I directly modify a Google Chrome Extension File? (.CRX)

Question

I\'m not sure in which languages those extensions are, I think the are written in Html, Javascript or JSON. As far as I know they are \"compressed\" in a .CRX file.

Answer 1

(Already said) I found this out while making some Chrome themes (which are long gone now... :-P)

Chrome themes, extensions, etc. are just compressed files. Get 7-zip or WinRar to unzip it. Each extension/theme has a manifest.json file. Open the manifest.json file in notepad. Then, if you know the coding, modify the code. There will be some other files. If you look in the manifest file you might be able to figure out what the are for. Then, you can change everything...