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Supported Browsers

ContextFort is currently available for Google Chrome and Chromium-based browsers that support Chrome extensions.

Google Chrome

Minimum Version: 134
Status: ✅ Fully Supported

Microsoft Edge

Minimum Version: Chromium 134
Status: ✅ Compatible*

Brave Browser

Minimum Version: Based on Chrome 134
Status: ✅ Compatible*

Arc Browser

Minimum Version: Based on Chrome 134
Status: ✅ Compatible*
*While ContextFort should work on Chromium-based browsers, official testing and support is provided for Google Chrome only. Some features may behave differently on other browsers.

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Version Requirements

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Minimum Chrome Version: 134

ContextFort requires Chrome 134 or higher. The extension will not install on older versions.
This requirement exists because ContextFort relies on modern Chrome APIs introduced in recent versions:
Required for: Session organization and agent trackingContextFort uses tab groups to identify when agents are active. The chrome.tabGroups API allows the extension to:
  • Monitor tab group creation and updates
  • Detect emoji changes in group titles (⌛ → ✅)
  • Associate sessions with specific tab groups
  • Automatically end sessions when groups are removed
Minimum Version: Chrome 89 (but enhanced features require Chrome 134)
Required for: High-performance URL blockingThe chrome.declarativeNetRequest API enables governance rules:
  • Block URLs with query parameters
  • Block clickable links for agent browsing restrictions
  • Dynamic rule updates without page reloads
  • Better performance than traditional webRequest blocking
Minimum Version: Chrome 84 (stable API in Chrome 134)
Required for: Background script executionContextFort uses Manifest V3, which replaces persistent background pages with service workers:
  • More efficient resource usage
  • Better security model
  • Required for all new Chrome extensions
  • Event-driven architecture
Minimum Version: Chrome 88 (required in Chrome 127+)
Required for: Dynamic code injectionThe chrome.scripting API allows ContextFort to:
  • Execute scripts to interact with agent stop buttons
  • Inject content scripts at specific timings
  • Better security than older tabs.executeScript
Minimum Version: Chrome 88 (enhanced in Chrome 134)

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Checking Your Chrome Version

1

Open Chrome Settings

Click the three-dot menu in the top-right corner of Chrome
2

Navigate to About

Go to Help → About Google Chrome
3

View Version

Your version number will be displayed (e.g., “Version 134.0.6998.70”)
4

Update if Needed

If your version is below 134, Chrome will automatically check for updates. Click Relaunch to complete the update.

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Firefox Support

Firefox is NOT currently supported. ContextFort is built specifically for Chrome’s extension APIs.
Firefox compatibility would require significant changes:
  • Tab Groups - Firefox does not have a native Tab Groups API
  • Manifest V3 - Firefox has partial MV3 support with different behavior
  • Cookies API - Different cookie management implementation
  • WebExtensions - While similar, not identical to Chrome’s API
There are currently no plans to support Firefox, but community contributions are welcome.

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Safari Support

Safari is NOT currently supported. Safari uses a different extension architecture.
Safari extensions require:
  • Xcode and Safari Web Extensions conversion
  • Different cookie and storage APIs
  • App Store distribution
  • macOS/iOS specific considerations
There are currently no plans to support Safari.

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Operating System Compatibility

ContextFort works on all operating systems that support Chrome 134+:
Supported Versions:
  • Windows 10 (version 1809 or later)
  • Windows 11 (all versions)
Installation: Standard Chrome Web Store installation

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Feature Compatibility Matrix

FeatureChrome 134+EdgeBraveArcFirefoxSafari
Agent Detection✅✅*✅*✅*❌❌
Session Isolation✅✅*✅*✅*❌❌
Screenshot Capture✅✅*✅*✅*❌❌
URL Blocking✅✅*⚠️**✅*❌❌
Action Blocking✅✅*✅*✅*❌❌
Dashboard✅✅*✅*✅*❌❌
Legend:
  • ✅ = Fully Supported
  • ✅* = Compatible but not officially tested
  • ⚠️** = May require additional permissions in Brave’s shield settings
  • ❌ = Not Supported

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Known Browser-Specific Issues

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Brave Browser

Brave’s aggressive privacy shields may interfere with ContextFort’s functionality.
If features aren’t working:
  1. Click the Brave shield icon in the address bar
  2. Disable “Block Scripts” for the problematic site
  3. Reload the page

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Arc Browser

Arc’s custom tab management may affect session tracking. If you experience issues, ensure agent tabs are in a standard Chrome tab group, not Arc’s native “Spaces.”

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Edge Browser

Edge users must install from the Chrome Web Store, not the Edge Add-ons store. The extension is not currently published to the Edge store.

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Update Policy

ContextFort follows Chrome’s rapid release cycle:
  • Minimum version will be updated periodically to leverage new Chrome features
  • Users will be notified before breaking changes
  • Extension auto-updates when new versions are published
  • Backward compatibility maintained for at least 2 major Chrome versions when possible

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Reporting Compatibility Issues

If you encounter browser-specific issues:
  1. Check your Chrome version meets the minimum requirement (134+)
  2. Verify the issue persists after disabling other extensions
  3. Report the issue on GitHub Issues
Include:
  • Browser name and version
  • Operating system
  • Steps to reproduce
  • Console errors (F12 → Console tab)

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