Examine source code of Mediapart Onepage

{
  "manifest_version": 2,
  "name": "Mediapart Onepage",
  "version": "1.1resigned1",
  "description": "ALways display Mediapart.fr articles on one page",
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://www.mediapart.fr/*"
  ],
  "background": {
    "scripts": [
      "onepage.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6981d72c-787f-4ed7-98ff-253e1c8f40e6}"
    }
  }
}