Examine source code of Multi Copy Paste 8 slots

{
  "manifest_version": 2,
  "name": "Multi Copy Paste",
  "version": "1.0",
  "description": "Copy and paste multiple texts and links using shortcuts.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "commands": {
    "copy_text_1": {
      "suggested_key": {
        "default": "Alt+Z"
      },
      "description": "Copy text slot 1"
    },
    "copy_text_2": {
      "suggested_key": {
        "default": "Alt+X"
      },
      "description": "Copy text slot 2"
    },
    "copy_text_3": {
      "suggested_key": {
        "default": "Alt+C"
      },
      "description": "Copy text slot 3"
    },
    "copy_text_4": {
      "suggested_key": {
        "default": "Alt+N"
      },
      "description": "Copy text slot 4"
    },
    "copy_text_5": {
      "suggested_key": {
        "default": "Alt+M"
      },
      "description": "Copy text slot 5"
    },
    "copy_text_6": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Copy text slot 6"
    },
    "copy_text_7": {
      "suggested_key": {
        "default": "Alt+J"
      },
      "description": "Copy text slot 7"
    },
    "copy_text_8": {
      "suggested_key": {
        "default": "Alt+G"
      },
      "description": "Copy text slot 8"
    },
    "copy_link_1": {
      "suggested_key": {
        "default": "Shift+Alt+Z"
      },
      "description": "Copy text+link slot 1"
    },
    "copy_link_2": {
      "suggested_key": {
        "default": "Shift+Alt+X"
      },
      "description": "Copy text+link slot 2"
    },
    "copy_link_3": {
      "suggested_key": {
        "default": "Shift+Alt+C"
      },
      "description": "Copy text+link slot 3"
    },
    "copy_link_4": {
      "suggested_key": {
        "default": "Shift+Alt+N"
      },
      "description": "Copy text+link slot 4"
    },
    "copy_link_5": {
      "suggested_key": {
        "default": "Shift+Alt+M"
      },
      "description": "Copy text+link slot 5"
    },
    "copy_link_6": {
      "suggested_key": {
        "default": "Shift+Alt+A"
      },
      "description": "Copy text+link slot 6"
    },
    "paste_text_1": {
      "suggested_key": {
        "default": "Alt+K"
      },
      "description": "Paste text slot 1"
    },
    "paste_text_2": {
      "suggested_key": {
        "default": "Alt+L"
      },
      "description": "Paste text slot 2"
    },
    "paste_text_3": {
      "suggested_key": {
        "default": "Alt+Q"
      },
      "description": "Paste text slot 3"
    },
    "paste_text_4": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Paste text slot 4"
    },
    "paste_text_5": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "Paste text slot 5"
    },
    "paste_text_6": {
      "suggested_key": {
        "default": "Alt+Y"
      },
      "description": "Paste text slot 6"
    },
    "paste_text_7": {
      "suggested_key": {
        "default": "Alt+U"
      },
      "description": "Paste text slot 7"
    },
    "paste_text_8": {
      "suggested_key": {
        "default": "Alt+I"
      },
      "description": "Paste text slot 8"
    },
    "paste_link_1": {
      "suggested_key": {
        "default": "Alt+O"
      },
      "description": "Paste text+link slot 1"
    },
    "paste_link_2": {
      "suggested_key": {
        "default": "Alt+P"
      },
      "description": "Paste text+link slot 2"
    },
    "paste_link_3": {
      "suggested_key": {
        "default": "Shift+Alt+Q"
      },
      "description": "Paste text+link slot 3"
    },
    "paste_link_4": {
      "suggested_key": {
        "default": "Shift+Alt+W"
      },
      "description": "Paste text+link slot 4"
    },
    "paste_link_5": {
      "suggested_key": {
        "default": "Shift+Alt+E"
      },
      "description": "Paste text+link slot 5"
    },
    "paste_link_6": {
      "suggested_key": {
        "default": "Shift+Alt+R"
      },
      "description": "Paste text+link slot 6"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e23d1f8e-c75b-4d22-a680-c28d460fd4ce}"
    }
  }
}