Examine source code of RiteBoost

{
  "manifest_version": 2,
  "name": "RiteBoost",
  "short_name": "RiteBoost",
  "description": "Improve the ROI of your posts with one click, right in your favorite scheduling tool.",
  "version": "4.5.21",
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon-32.png",
    "48": "img/icon-48.png",
    "64": "img/icon-64.png",
    "128": "img/icon-128.png",
    "256": "img/icon-256.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "img/icon-19.png"
    },
    "default_popup": "html/popup.html",
    "default_title": "RiteBoost"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "img/*",
    "fonts/*",
    "js/libs/*",
    "js/*",
    "html/*",
    "js/*",
    "css/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "*://*.ritetag.com/hootsuite/app*",
        "*://*.ritetag.com/hootsuite/optimize*"
      ],
      "css": [
        "css/riteboost.css"
      ],
      "js": [
        "js/riteboost.js"
      ]
    },
    {
      "matches": [
        "*://twitter.com/*"
      ],
      "exclude_matches": [
        "*://twitter.com/intent*"
      ],
      "js": [
        "js/twitter.js"
      ]
    },
    {
      "matches": [
        "*://twitter.com/intent*"
      ],
      "js": [
        "js/twitter-intent.js"
      ]
    },
    {
      "matches": [
        "*://*.buffer.com/*"
      ],
      "exclude_matches": [
        "*://*.buffer.com/add*"
      ],
      "js": [
        "js/buffer.js"
      ]
    },
    {
      "matches": [
        "*://*.sendible.com/*"
      ],
      "js": [
        "js/sendible.js"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "*://*.hootsuite.com/*"
      ],
      "js": [
        "js/hootsuite.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*",
    "contextMenus",
    "<all_urls>",
    "notifications"
  ]
}