Examine source code of Say It

{
  "manifest_version": 2,
  "name": "Say It",
  "short_name": "Say It",
  "description": "Highlight a word then say it",
  "version": "0.5.0",
  "author": "Eric King",
  "homepage_url": "https://github.com/webdeveric/say-it-web-ext",
  "browser_specific_settings": {
    "gecko": {
      "id": "@say-it",
      "strict_min_version": "106.0"
    }
  },
  "icons": {
    "48": "icons/speaker.svg",
    "96": "icons/speaker.svg"
  },
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "browser_action": {
    "default_title": "Say It",
    "default_popup": "browserAction.html",
    "default_icon": {
      "19": "icons/speaker.svg",
      "38": "icons/speaker.svg"
    }
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Shift+Alt+A",
        "mac": "Shift+MacCtrl+A"
      }
    },
    "stop-speaking": {
      "suggested_key": {
        "default": "Shift+Alt+W",
        "mac": "Shift+MacCtrl+W"
      },
      "description": "Stop speaking"
    },
    "repeat-last-phrase": {
      "suggested_key": {
        "default": "Shift+Alt+D",
        "mac": "Shift+MacCtrl+D"
      },
      "description": "Say it again"
    }
  }
}