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{  "manifest_version": 2,  "name": "SheetJS Demo",  "description": "Sample Extension using SheetJS to interact with Chrome",  "version": "0.0.1",  "browser_action": {    "default_popup": "popup.html",    "default_icon": "logo.png"  },  "background": {    "scripts": ["xlsx.full.min.js", "table.js"],    "persistent": false  },  "content_scripts": [{    "matches": ["<all_urls>"],    "js": ["content.js", "xlsx.full.min.js"],    "run_at": "document_end"  }],  "icons": {    "16": "logo.png"  },  "permissions": [    "activeTab",    "<all_urls>",    "bookmarks",    "contextMenus",    "downloads",    "tabs"  ]}