An URL used to inject a content script into web pages in Chrome extension

Question

In the manifest file of the Chrome extension "Search by Image", which allows you to search images on Google by just right clicking pictures on the web, the "content_scripts" field looks like this:

"content_scripts": [ {
  "css": [ "quimby.css" ],
  "js": [ "jquery-1.7.1.min.js", "quimby.js" ],
  "matches": [ "\u003Call_urls\u003E" ]
} ]

How does the match pattern "\u003Call_urls\u003E" work?

Answer 1

\u003C and \u003E are unicode characters. What it is matching is <all_urls>

Those files will be injected into every page that the extension has permission to modify.