Process Feedback for Google Docs

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Process Feedback for Google Docs",
    "description": "Shows the edit history of a Google Docs document.",
    "version": "3.9.2",
    "manifest_version": 3,
    "action": {
        "default_popup": "popup.html",
        "default_icon": "icon16.png"
    },
    "icons": {
        "16": "icon16.png",
        "32": "icon32.png",
        "48": "icon48.png",
        "128": "icon128.png"
    },
    "permissions": [
        "activeTab",
        "storage"
    ],
    "background": {
        "service_worker": "background.js"
    },
    "host_permissions": [
        "https:\/\/docs.google.com\/*",
        "https:\/\/classroom.google.com\/*"
    ],
    "content_scripts": [
        {
            "matches": [
                "https:\/\/docs.google.com\/document\/*"
            ],
            "js": [
                "pfMain.js"
            ],
            "all_frames": true
        },
        {
            "matches": [
                "https:\/\/docs.google.com\/document\/*",
                "https:\/\/classroom.google.com\/*"
            ],
            "js": [
                "placeholder-ribbon-injector.js"
            ],
            "run_at": "document_start",
            "all_frames": true
        },
        {
            "matches": [
                "https:\/\/classroom.google.com\/*"
            ],
            "js": [
                "classroomDetector.js"
            ],
            "run_at": "document_start",
            "all_frames": true
        },
        {
            "matches": [
                "https:\/\/app.processfeedback.org\/gdocs"
            ],
            "js": [
                "report-inject.js"
            ],
            "run_at": "document_start"
        }
    ],
    "web_accessible_resources": [
        {
            "resources": [
                "script.js",
                "pfMain.js",
                "placeholder-ribbon-injector.js"
            ],
            "matches": [
                "<all_urls>"
            ]
        }
    ]
}