Examine source code of Seamless Containers

{
  "manifest_version": 2,
  "name": "Seamless Containers",
  "version": "1.0.1",
  "incognito": "not_allowed",
  "description": "Makes switching containers seamless via automatic container opening and additional hotkeys.",
  "homepage_url": "https://github.com/rpbritton/seamless-containers#readme",
  "icons": {
    "64": "icon.png"
  },
  "permissions": [
    "contextualIdentities",
    "cookies",
    "storage",
    "tabs"
  ],
  "commands": {
    "open_container_0": {
      "suggested_key": {
        "default": "Ctrl+Shift+1"
      },
      "description": "Open Container Shortcut 1"
    },
    "open_container_1": {
      "suggested_key": {
        "default": "Ctrl+Shift+2"
      },
      "description": "Open Container Shortcut 2"
    },
    "open_container_2": {
      "suggested_key": {
        "default": "Ctrl+Shift+3"
      },
      "description": "Open Container Shortcut 3"
    },
    "open_container_3": {
      "suggested_key": {
        "default": "Ctrl+Shift+4"
      },
      "description": "Open Container Shortcut 4"
    },
    "open_container_4": {
      "suggested_key": {
        "default": "Ctrl+Shift+5"
      },
      "description": "Open Container Shortcut 5"
    },
    "open_container_5": {
      "suggested_key": {
        "default": "Ctrl+Shift+6"
      },
      "description": "Open Container Shortcut 6"
    },
    "open_container_6": {
      "suggested_key": {
        "default": "Ctrl+Shift+7"
      },
      "description": "Open Container Shortcut 7"
    },
    "open_container_7": {
      "suggested_key": {
        "default": "Ctrl+Shift+8"
      },
      "description": "Open Container Shortcut 8"
    },
    "open_container_8": {
      "suggested_key": {
        "default": "Ctrl+Shift+9"
      },
      "description": "Open Container Shortcut 9"
    },
    "open_container_9": {
      "suggested_key": {
        "default": "Ctrl+Shift+0"
      },
      "description": "Open Container Shortcut 10"
    },
    "reopen_container_0": {
      "suggested_key": {
        "default": "Ctrl+Alt+1"
      },
      "description": "Reopen Container Shortcut 1"
    },
    "reopen_container_1": {
      "suggested_key": {
        "default": "Ctrl+Alt+2"
      },
      "description": "Reopen Container Shortcut 2"
    },
    "reopen_container_2": {
      "suggested_key": {
        "default": "Ctrl+Alt+3"
      },
      "description": "Reopen Container Shortcut 3"
    },
    "reopen_container_3": {
      "suggested_key": {
        "default": "Ctrl+Alt+4"
      },
      "description": "Reopen Container Shortcut 4"
    },
    "reopen_container_4": {
      "suggested_key": {
        "default": "Ctrl+Alt+5"
      },
      "description": "Reopen Container Shortcut 5"
    },
    "reopen_container_5": {
      "suggested_key": {
        "default": "Ctrl+Alt+6"
      },
      "description": "Reopen Container Shortcut 6"
    },
    "reopen_container_6": {
      "suggested_key": {
        "default": "Ctrl+Alt+7"
      },
      "description": "Reopen Container Shortcut 7"
    },
    "reopen_container_7": {
      "suggested_key": {
        "default": "Ctrl+Alt+8"
      },
      "description": "Reopen Container Shortcut 8"
    },
    "reopen_container_8": {
      "suggested_key": {
        "default": "Ctrl+Alt+9"
      },
      "description": "Reopen Container Shortcut 9"
    },
    "reopen_container_9": {
      "suggested_key": {
        "default": "Ctrl+Alt+0"
      },
      "description": "Reopen Container Shortcut 10"
    }
  },
  "background": {
    "page": "background/background.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  }
}