Examine source code of I Hate Low Contrast.

{
  "manifest_version": 2,
  "name": "I Hate Low Contrast.",
  "description": "Improve Contrast of Web Pages",
  "version": "3.2.9",
  "options_ui": {
    "page": "popup.html",
    "chrome_style": true
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ihatelowcontrast2@djwong.org"
    }
  },
  "icons": {
    "512": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "file:///*",
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "common.js",
        "fix_contrast.js"
      ],
      "run_at": "document_end",
      "exclude_globs": [
        "*mail.google.com*",
        "*wikia.com*",
        "*zillow.com*",
        "*djwong.org*fstests*",
        "*djwong.dev*fstests*"
      ]
    }
  ]
}