Examine source code of Read Stuff Later

{
  "name": "Read Stuff Later",
  "version": "0.0.7",
  "manifest_version": 2,
  "description": "Save links to read later!",
  "homepage_url": "https://readstufflater.com",
  "icons": {
    "16": "icons/favicon-16x16.png",
    "48": "icons/favicon-32x32.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "src/bg/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "ReadStuffLater -> save for later"
  },
  "permissions": [
    "contextMenus",
    "storage",
    "cookies",
    "notifications",
    "tabs",
    "https://app.readstufflater.com/api/receive_link/webextension"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{370755fa-0928-4363-a746-6c8253330126}"
    }
  }
}