Examine source code of Assima Train

{
  "manifest_version": 2,
  "name": "Assima Train",
  "version": "1.0.3.37",
  "description": "Browser extension for users of Assima Train, used to deliver the full functionalities offered by the Assima platform.",
  "homepage_url": "http://www.assima.net/",
  "icons": {
    "16": "images/icon16.png",
    "38": "images/icon38.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "author": "Assima Inc.",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "external/jquery-3.3.1.min.js",
      "common/assima.common.main.js",
      "common/assima.common.debug.js",
      "common/assima.common.events.js",
      "common/assima.common.browser.js",
      "common/assima.constants.js",
      "common/assima.common.logging.js",
      "common/assima.utils.js",
      "common/assima.runtime.js",
      "common/assima.common.webSockets.js",
      "grabber/assima.grabber.constants.js",
      "grabber/assima.grabber.background.tabs.js",
      "grabber/assima.grabber.background.runner.js"
    ]
  },
  "permissions": [
    "tabs",
    "<all_urls>",
    "webNavigation"
  ],
  "applications": {
    "gecko": {
      "id": "vimago.train@assima.net",
      "strict_min_version": "74.0"
    }
  }
}