Rewritify

Replace text across all websites using regular expressions. It's like find and replace for the entire internet! You can add patterns via the preferences pages and then when you load a website it'll replace all the text matching that pattern.

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manifest.json

{
  "manifest_version": 2,
  "name": "Rewritify",
  "version": "1.1resigned1",
  "description": "Replace text across all websites using regular expressions. It's like find and replace for the entire internet!",
  "icons": {
    "48": "icons/ic_find_replace_black_48dp_1x.png",
    "96": "icons/ic_find_replace_black_48dp_2x.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "rewrite.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20ab8402-8ffc-497c-859b-81900038e79a}"
    }
  }
}