Accessing iframes from a Chrome content-script extension

Question

Hi,

I'm writing a Chrome extension that needs to alter a popular web app when loaded. Unfortunately, most of the UI of that web app is rendered inside an iframe, and although the address of that iframe matches my content_scripts match declaration, the user script only gets invoked for the top frame.

Q: Is there a method of accessing HTML rendered inside an iframe from a Chrome content script extension? If yes, what permissions and other manifest options should I specify? Thanks.

Answer 1

I've resolved the problem. The following option has to be specified in the content_scripts section of the manifest.json: "all_frames": true. Without it, the script is only applied to the top frame.

// Sometimes one just has to RTFM carefully.