how to put popup automatically open in extension page action by url

Question

I'm developing an extension page action that works in certain URLs with popup, I wonder if you can open the popup automatically when the User access the specific site?

Answer 1

Define the 'matches' in the manifest.json file like the following:

"matches": ["http://www.site.ext/*"]

Then the content script of your extension will be loaded when the specific site is visited and you can do almost everything.

For more information refer Chrome -> Content Scripts