Examine source code of SALESForce THEME

{
  "manifest_version": 3,
  "name": "SALES Force THEME",
  "version": "2.2.3",
  "description": "Modifies case status colors and adds custom visual overlays on Salesforce Lightning.",
  "author": "Krzysztof Kowalski",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "logo/logo_16.png",
      "24": "logo/logo_24.png",
      "32": "logo/logo_32.png",
      "48": "logo/logo_48.png",
      "64": "logo/logo_64.png",
      "128": "logo/logo_128.png"
    }
  },
  "icons": {
    "16": "logo/logo_16.png",
    "24": "logo/logo_24.png",
    "48": "logo/logo_48.png",
    "64": "logo/logo_64.png",
    "128": "logo/logo_128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.lightning.force.com/*",
        "https://*.force.com/*"
      ],
      "js": [
        "js/content.js",
        "js/main_logic.js"
      ],
      "css": [
        "css/styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "salesforce-theme-k.kowalski78@icloud.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}