Examine source code of Custom Shortcut

{
  "manifest_version": 2,
  "name": "Shortkeys (Custom Keyboard Shortcuts)",
  "description": "Custom keyboard shortcuts for your browser",
  "version": "5.0.2",
  "short_name": "Shortkeys",
  "icons": {
    "16": "/images/icon_16.png",
    "48": "/images/icon_48.png",
    "128": "/images/icon_128.png"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{27f7906c-c333-42f1-8ec4-4e30b2b97df9}",
      "strict_min_version": "109.0"
    }
  },
  "commands": {
    "01-newtab": {
      "description": "TABS: New tab"
    },
    "02-closetab": {
      "description": "TABS: Close tab"
    },
    "03-nexttab": {
      "description": "TABS: Next tab"
    },
    "04-prevtab": {
      "description": "TABS: Previous tab"
    },
    "05-togglepin": {
      "description": "TABS: Pin/unpin tab"
    },
    "06-togglemute": {
      "description": "TABS: Mute/unmute tab"
    },
    "07-onlytab": {
      "description": "TABS: Close other tabs"
    },
    "08-closelefttabs": {
      "description": "TABS: Close tabs to the left"
    },
    "09-closerighttabs": {
      "description": "TABS: Close tabs to the right"
    },
    "10-closeduplicatetabs": {
      "description": "TABS: Close duplicate tabs"
    },
    "11-clonetab": {
      "description": "TABS: Duplicate tab"
    },
    "12-movetabtonewwindow": {
      "description": "TABS: Move tab to new window"
    },
    "13-reopentab": {
      "description": "TABS: Reopen closed tab"
    },
    "14-firsttab": {
      "description": "TABS: First tab"
    },
    "15-lasttab": {
      "description": "TABS: Last tab"
    },
    "16-lastusedtab": {
      "description": "TABS: Switch to last used tab"
    },
    "17-movetableft": {
      "description": "TABS: Move tab to the left"
    },
    "18-movetabright": {
      "description": "TABS: Move tab to the right"
    },
    "19-movetabtofirst": {
      "description": "TABS: Move tab to first position"
    },
    "20-movetabtolast": {
      "description": "TABS: Move tab to last position"
    },
    "21-sorttabs": {
      "description": "TABS: Sort tabs alphabetically by title"
    },
    "22-discardtab": {
      "description": "TABS: Suspend tab (free memory)"
    },
    "23-newwindow": {
      "description": "WINDOWS: New window"
    },
    "24-newprivatewindow": {
      "description": "WINDOWS: New private window"
    },
    "25-closewindow": {
      "description": "WINDOWS: Close window"
    },
    "26-fullscreen": {
      "description": "WINDOWS: Toggle fullscreen"
    },
    "27-zoomin": {
      "description": "ZOOMING: Zoom in"
    },
    "28-zoomout": {
      "description": "ZOOMING: Zoom out"
    },
    "29-zoomreset": {
      "description": "ZOOMING: Zoom reset"
    },
    "30-back": {
      "description": "LOCATION: Go back"
    },
    "31-forward": {
      "description": "LOCATION: Go forward"
    },
    "32-reload": {
      "description": "LOCATION: Reload"
    },
    "33-hardreload": {
      "description": "LOCATION: Hard reload (bypass cache)"
    },
    "34-copyurl": {
      "description": "LOCATION: Copy URL to clipboard"
    },
    "35-copypagetitle": {
      "description": "LOCATION: Copy page title"
    },
    "36-copytitleurl": {
      "description": "LOCATION: Copy title and URL"
    },
    "37-copytitleurlmarkdown": {
      "description": "LOCATION: Copy as markdown link [title](url)"
    },
    "38-openclipboardurl": {
      "description": "LOCATION: Open URL from clipboard"
    },
    "39-openclipboardurlnewtab": {
      "description": "LOCATION: Open URL from clipboard in new tab"
    },
    "40-searchgoogle": {
      "description": "LOCATION: Search Google for selected text"
    },
    "41-opensettings": {
      "description": "LOCATION: Open Settings Page"
    },
    "42-openextensions": {
      "description": "LOCATION: Open Extensions Page"
    },
    "43-openshortcuts": {
      "description": "LOCATION: Open Keyboard Shortcuts Page"
    },
    "44-top": {
      "description": "SCROLLING: Scroll to top"
    },
    "45-bottom": {
      "description": "SCROLLING: Scroll to bottom"
    },
    "46-scrolldown": {
      "description": "SCROLLING: Scroll down"
    },
    "47-scrolldownmore": {
      "description": "SCROLLING: Scroll down more"
    },
    "48-pagedown": {
      "description": "SCROLLING: Page down"
    },
    "49-scrollup": {
      "description": "SCROLLING: Scroll up"
    },
    "50-scrollupmore": {
      "description": "SCROLLING: Scroll up more"
    },
    "51-pageup": {
      "description": "SCROLLING: Page up"
    },
    "52-scrollright": {
      "description": "SCROLLING: Scroll right"
    },
    "53-scrollrightmore": {
      "description": "SCROLLING: Scroll right more"
    },
    "54-scrollleft": {
      "description": "SCROLLING: Scroll left"
    },
    "55-scrollleftmore": {
      "description": "SCROLLING: Scroll left more"
    },
    "56-cleardownloads": {
      "description": "UTILITY: Clear downloads"
    },
    "57-showlatestdownload": {
      "description": "UTILITY: Show latest download"
    },
    "58-viewsource": {
      "description": "UTILITY: View source"
    },
    "59-print": {
      "description": "UTILITY: Print page"
    },
    "60-togglebookmark": {
      "description": "UTILITY: Bookmark/unbookmark current page"
    },
    "61-openincognito": {
      "description": "UTILITY: Open current page in incognito window"
    },
    "62-capturescreenshot": {
      "description": "UTILITY: Capture current viewport screenshot"
    },
    "63-capturefullsizescreenshot": {
      "description": "UTILITY: Capture full size screenshot (max 16,348px)"
    },
    "64-forcecapturefullsizescreenshot": {
      "description": "UTILITY: Force capture full size screenshot"
    },
    "65-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "66-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "67-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "68-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "69-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "70-disable": {
      "description": "UTILITY: Do nothing (disable browser shortcut)"
    },
    "71-videoplaypause": {
      "description": "VIDEO: Play/pause"
    },
    "72-videomute": {
      "description": "VIDEO: Mute/unmute"
    },
    "73-videofullscreen": {
      "description": "VIDEO: Toggle fullscreen"
    },
    "74-videospeedup": {
      "description": "VIDEO: Speed up (0.25×)"
    },
    "75-videospeeddown": {
      "description": "VIDEO: Slow down (0.25×)"
    },
    "76-videospeedreset": {
      "description": "VIDEO: Reset speed to 1×"
    },
    "77-videoskipforward": {
      "description": "VIDEO: Skip forward 10s"
    },
    "78-videoskipback": {
      "description": "VIDEO: Skip back 10s"
    },
    "79-searchyoutube": {
      "description": "SEARCH: Search YouTube for selected text"
    },
    "80-searchwikipedia": {
      "description": "SEARCH: Search Wikipedia for selected text"
    },
    "81-searchgithub": {
      "description": "SEARCH: Search GitHub for selected text"
    },
    "82-newtabright": {
      "description": "TABS: New tab to the right"
    },
    "83-audibletab": {
      "description": "TABS: Jump to tab playing audio/video"
    },
    "84-grouptab": {
      "description": "TABS: Add tab to new group"
    },
    "85-ungrouptab": {
      "description": "TABS: Remove tab from group"
    },
    "86-togglegrouptab": {
      "description": "TABS: Toggle group/ungroup tab"
    },
    "87-namegroup": {
      "description": "TABS: Name current tab group"
    },
    "88-collapsegroup": {
      "description": "TABS: Collapse selected tab group"
    },
    "91-selecttableft": {
      "description": "TABS: Select tab to the left"
    },
    "92-selecttabright": {
      "description": "TABS: Select tab to the right"
    }
  },
  "permissions": [
    "downloads",
    "storage",
    "tabs",
    "clipboardWrite",
    "browsingData",
    "bookmarks",
    "sessions",
    "management",
    "scripting",
    "notifications",
    "activeTab",
    "*://*/*"
  ],
  "optional_permissions": [
    "clipboardRead"
  ],
  "externally_connectable": {
    "matches": [
      "https://shortkeys.app/*",
      "http://localhost/*"
    ]
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline'; style-src-elem 'self' 'unsafe-inline' https://cdn.materialdesignicons.com https://cdn.jsdelivr.net;",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Shortkeys",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "file:///*"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}