Examine source code of Many Tabs Manager

{
  "manifest_version": 2,
  "name": "Many Tabs Manager",
  "version": "1.3.0",
  "description": "An advanced sidebar tool to filter, sort, and group your tabs. Easily close, move, or switch to tabs and see when they were last accessed.",
  "permissions": [
    "tabs"
  ],
  "icons": {
    "24": "icon.svg"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Many Tabs Manager",
    "default_icon": "icon.svg"
  },
  "sidebar_action": {
    "default_title": "Many Tabs Manager",
    "default_panel": "popup.html",
    "default_icon": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c255714-a089-4216-88ee-652d75f6443c}"
    }
  }
}