Examine source code of Write-up.dev Quick Import

{
  "manifest_version": 2,
  "name": "Write-up.dev Quick Import",
  "version": "0.1.0",
  "description": "Send selected text to write-up.dev as a new document.",
  "permissions": [
    "contextMenus",
    "storage",
    "tabs",
    "https://write-up.dev/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "writeup-import@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Send selection to Write-up.dev"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}