Examine source code of Bb Doc Viewer+

{
  "manifest_version": 2,
  "name": "Bb Doc Viewer+",
  "version": "2.2.1",
  "description": "Various improvements to Blackboard, especially for viewing documents",
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.api.blackboard.com/*",
        "*://learn.bu.edu/*"
      ],
      "js": [
        "index.js"
      ],
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ade62bdd-db92-4829-8033-80fad58a0f49}"
    }
  }
}