Examine source code of MarkOb - Highligthed text to Obsidian

{
  "description": "Highlight your text and send it to your Obsidian vault. It automatically creates you a file with the name of the page.",
  "manifest_version": 2,
  "name": "MarkOb - Highligthed text to Obsidian",
  "version": "1.1",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "exhigh.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "highlight-text": {
      "suggested_key": {
        "default": "Alt+J",
        "mac": "Alt+J"
      },
      "description": "Highlight selected text"
    },
    "highlight-text-note": {
      "suggested_key": {
        "default": "Alt+K",
        "mac": "Alt+K"
      },
      "description": "Highlight selected text adding a note"
    },
    "highlight-text-tags": {
      "suggested_key": {
        "default": "Alt+L",
        "mac": "Alt+L"
      },
      "description": "Highlight selected text adding tags"
    },
    "highlight-text-note-tags": {
      "suggested_key": {
        "default": "Alt+P",
        "mac": "Alt+P"
      },
      "description": "Highlight selected text adding a note and tags"
    }
  },
  "permissions": [
    "<all_urls>",
    "contextMenus",
    "notifications",
    "webNavigation",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "MarkOb",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rooyca@r00yca"
    }
  }
}