Examine source code of Blaze Read

{
  "manifest_version": 3,
  "name": "Blaze Read",
  "version": "6.999",
  "description": "A modern speed reading extension for Firefox",
  "icons": {
    "96": "icon.svg"
  },
  "permissions": [
    "storage",
    "alarms",
    "menus",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": "icon.svg",
    "default_title": "Blaze Read",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "Readability.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "popup.html",
    "open_in_tab": true
  },
  "commands": {
    "start-blaze-read": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Start or stop Blaze Read"
    },
    "start-blaze-read-fullscreen": {
      "suggested_key": {
        "default": "Alt+Shift+W"
      },
      "description": "Start or stop Blaze Read in fullscreen"
    },
    "open-local-pdf": {
      "suggested_key": {
        "default": "Alt+P"
      },
      "description": "Open the local PDF picker"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icon.svg",
        "font.woff2",
        "fontmain.woff2",
        "LexendDeca.woff2",
        "FunnelDisplay.woff2",
        "RobotoMono.woff2",
        "update.html",
        "rating.html",
        "rating.js",
        "blaze-reader/*.js",
        "pdf-reader.html",
        "pdf-reader.js",
        "pdfjs/*.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self';"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{de74d322-ed20-4422-8b90-f8f8a0945928}"
    }
  }
}