Safety Center

What is Safety Center?

Safety Center is your personal security dashboard within modcore Extension Manager. It analyzes all your installed browser extensions and gives you clear, easy-to-understand insights into what each extension can access, how risky those permissions are, and whether an extension respects your privacy.

Unlike traditional security tools that rely on external databases or reputation scores, Safety Center works entirely on your device. It examines the actual permissions each extension declares and calculates risk scores based on what those permissions can theoretically do - not based on whether the extension is "known" to be malicious.

Understanding Your Security Scores

When you view any extension in Safety Center, you'll see three scores:

Overall Score combines both security and privacy factors into a single number (0-100). This is your at-a-glance indicator of how "safe" an extension is based purely on what it requests access to.

Security Score measures how much an extension could potentially compromise your browser's integrity, access sensitive data, or interact with your system. Extensions that can read passwords, inject code into websites, or communicate with native applications score lower here.

Privacy Score indicates how much an extension can track you, access your personal information, or monitor your browsing behavior. Permissions that read your history, location, or clipboard content reduce this score.

Higher scores are better. A score of 85+ is excellent, while anything below 50 warrants careful consideration.

How Risk Levels Work

Safety Center categorizes permissions into four risk tiers:

Critical Risk permissions are the most powerful and dangerous. These include abilities like accessing all websites you visit (<all_urls>), executing arbitrary code on pages (scripting), reading everything you copy to your clipboard (clipboardRead), or accessing your precise location (geolocation). Extensions with critical permissions can potentially see passwords, financial data, or track your physical movements. Safety Center highlights these in red and auto-expands them so you can't miss them.

High Risk permissions provide significant access to your browsing data or browser controls. This includes reading your browsing history, managing other extensions, or capturing screenshots of your tabs. While often legitimate (like for session managers or productivity tools), these capabilities require trust in the developer.

Moderate Risk covers permissions that have legitimate uses but could be misused, such as managing downloads, accessing your bookmarks, or modifying content settings. These are typically safe but worth reviewing to ensure they match the extension's stated purpose.

Low Risk permissions are standard functionality with minimal security implications - things like displaying notifications, storing the extension's own data, or adding right-click menu items. These rarely pose privacy or security concerns.

The Dashboard: Your Security Overview

The main Safety Center dashboard gives you a bird's-eye view of your extension ecosystem. At the top, you'll see summary statistics: how many extensions you have installed, how many are currently active, and how many fall into each risk category.

The Permission Analysis section shows which permissions are most common across your extensions. This helps you identify patterns - if fifteen extensions all request clipboard access, for example, that might indicate overreach by some of them. Click any permission here to see exactly which extensions use it.

The Risk Distribution section breaks down your extensions by their overall safety rating. Click any category to see all extensions classified as "High Risk," "Concerning," "Moderate," "Good," or "Excellent."

Below these insights, you'll find a searchable grid of all your extensions. You can filter by name, specific permission, or risk level to quickly find extensions you want to examine further.

Deep Dive: Individual Extension Reports

Click any extension to view its detailed security report. This view shows the three scores prominently, with the Overall Score displayed large and color-coded (green for safe, orange for caution, red for danger).

The Permission Details section lists every permission the extension declares, grouped by risk level. Critical and high-risk permissions are automatically expanded so you see them immediately; lower-risk permissions are collapsed to reduce clutter. Each permission includes a plain-English explanation of what it does and why it matters for your security or privacy.

If you're unsure about a technical permission name, the description explains the real-world impact - like how "webRequest" means the extension can monitor every website you visit, or how "nativeMessaging" creates a bridge between your browser and programs installed on your computer.

Why This Approach Matters

Safety Center uses a permission-focused model because permissions are the fundamental building blocks of extension capability. An extension with <all_urls> and scripting permissions can theoretically do almost anything on any website you visit, regardless of whether it's "supposed" to be a simple calculator or a note-taking tool.

By evaluating permissions rather than maintaining a database of "good" or "bad" extensions, Safety Center remains effective against new or obscure extensions. It also avoids false positives—an extension isn't marked risky because it's new or unpopular, but only because of what it technically can do with the access you've granted it.

This approach empowers you to make informed decisions. You might decide that a password manager needs <all_urls> access to function, or that an ad-blocker legitimately requires webRequest to block trackers. Safety Center doesn't tell you to uninstall extensions - it gives you the information to decide whether the functionality matches the permissions.

Technical Notes

For developers and advanced users who want to understand the implementation details:

Scoring Algorithm

The scoring system uses weighted impact values for each permission, with critical permissions receiving multipliers (1.5x) to reflect their disproportionate risk. Security and privacy impacts are calculated separately, then combined using a weighted formula that favors the lower score (min(security, privacy) × 0.7 + max(security, privacy) × 0.3). This ensures extensions with severe weaknesses in either dimension cannot achieve high overall scores.

A "permission sprawl" penalty applies diminishing returns: each additional permission beyond the first adds a small penalty (capped at 30 points), reflecting the increased attack surface and potential for permission interaction vulnerabilities.

Permission Classification

The system maps 50+ Chrome extension permissions to risk tiers using the Chrome Extensions API documentation. Critical permissions align with Chrome's most dangerous capabilities: cross-origin scripting, debugger access, proxy control, native messaging, and unrestricted host access. The classification considers both the API's technical capabilities and real-world abuse patterns.

Local-Only Analysis

All analysis occurs client-side using chrome.management.getAll(). No extension data, permission lists, or scores are transmitted to external servers. This ensures privacy and allows the tool to function offline or in restricted environments.

Edge Cases

Extensions declaring no permissions receive perfect scores (100/100/100), as they operate within standard content script isolation. Unknown permissions (new APIs not yet mapped) default to "moderate" risk with 50/50 security/privacy impact to encourage cautious evaluation without false positives.

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