Examine source code of Welovelinks

{
  "name": "Welovelinks",
  "version": "1.2.0",
  "description": "",
  "homepage_url": "https://www.welovelinks.com",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "applications": {
    "gecko": {
      "id": "addon@welovelinks.com",
      "strict_min_version": "67.0"
    }
  },
  "icons": {
    "128": "icon.png"
  },
  "permissions": [
    "*://www.welovelinks.com/*",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup/create.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.welovelinks.com/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ]
}