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manifest.json
{
"update_url": "https://clients2.google.com/service/update2/crx",
"manifest_version": 3,
"name": "GridMaster with Pixel Ruler and Crop",
"version": "1.1",
"description": "A simple grid line ruler with pixel rulers and cropping functionality to help place content on a webpage in a straight line.",
"permissions": [
"activeTab",
"scripting"
],
"action": {
"default_icon": {
"16": "icons/icon16.png",
"48": "icons/icon48.png",
"128": "icons/icon128.png"
}
},
"background": {
"service_worker": "background.js"
}
}