Examine source code of Shortcuts for search

{
  "manifest_version": 2,
  "name": "Shortcuts for search",
  "author": "Arthur Remy",
  "description": "Select the content your interested in on any web page. Activate your shortcut. A new tab is immediately opened with your research filled on the appropriate website.",
  "icons": {
    "48": "logo/grad_logo.svg"
  },
  "version": "1.0.2",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shortcuts.streamline@search.web"
    }
  },
  "commands": {
    "shortcut1": {
      "suggested_key": {
        "default": "Alt+X"
      }
    },
    "shortcut2": {},
    "shortcut3": {},
    "shortcut4": {},
    "shortcut5": {}
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Search shortcuts",
    "default_popup": "config_panel/config_panel.html",
    "default_icon": "logo/grad_logo.svg"
  },
  "options_ui": {
    "page": "config_panel/config_panel.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ]
}