Examine source code of Achromafox

{
  "manifest_version": 3,
  "name": "Achromafox",
  "version": "24.3.31",
  "description": "Achromafox is an AchromaJS-based tool to simulate different conditions of eye vision.",
  "author": "Hendrik Brandt",
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd6259af-e478-46c6-83c9-d3fcab41725f}",
      "strict_min_version": "109.0"
    }
  },
  "background": {
    "scripts": [
      "webextension/background.js"
    ]
  },
  "icons": {
    "16": "assets/icon_16.png",
    "32": "assets/icon_32.png",
    "48": "assets/icon_48.png",
    "128": "assets/icon_128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "scripting",
    "storage",
    "webNavigation"
  ],
  "optional_permissions": [
    "tabs",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "browser_style": true,
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/icon_16.png",
      "32": "assets/icon_32.png",
      "48": "assets/icon_48.png",
      "128": "assets/icon_128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "css": [
        "filters/filters.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "filters/*.*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}