Examine source code of LiveWorkSheets Toolbar

{
  "name": "LiveWorkSheets Toolbar",
  "description": "Improves a teacher's usability by simplifying annotation of worksheets.",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "https://*.liveworksheets.com/*",
    "https://*.us-east-1.awsapprunner.com/*",
    "https://*.devfactory.com/*",
    "storage",
    "activeTab",
    "tabs",
    "webRequest",
    "webNavigation"
  ],
  "page_action": {},
  "content_scripts": [
    {
      "matches": [
        "https://*.liveworksheets.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "common.js",
        "messages.js",
        "buttons/basebutton.js",
        "buttons/blob.js",
        "buttons/blank.js",
        "buttons/simplebox.js",
        "buttons/checkbox.js",
        "buttons/fuzzybox.js",
        "buttons/multichoice.js",
        "buttons/select.js",
        "buttons/similar.js",
        "popups/basepopup.js",
        "popups/selectpopup.js",
        "popups/choicepopup.js",
        "popups/tutorialpopup.js",
        "annotator.js",
        "metriccollector.js",
        "toolbar.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "toolbar.html",
    "styles.css",
    "injected.js",
    "images/multichoice.png",
    "images/blank.png",
    "images/blob.png",
    "images/select.png",
    "images/pattern.png",
    "images/check.png",
    "images/multichoice.gif",
    "images/blank.gif",
    "images/fuzzycheck.gif",
    "images/select.gif",
    "images/blob.gif",
    "images/similar.gif"
  ],
  "icons": {
    "16": "/images/get_started16.png",
    "32": "/images/get_started32.png",
    "48": "/images/get_started48.png",
    "128": "/images/get_started128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24307707-aa29-4d5a-8090-7935e4a1405f}"
    }
  }
}