Examine source code of dotepub

{
  "manifest_version": 2,
  "default_locale": "en",
  "name": "dotEPUB",
  "description": "__MSG_extDesc__",
  "version": "1.2.6resigned1",
  "icons": {
    "16": "icon.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "web_accessible_resources": [
    "images/*.png"
  ],
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "dotEPUB"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-xvjf0Huq7OaIkg@jetpack"
    }
  }
}