Competitive Analysis
How Live Resource Override compares to the most popular resource override, proxy, and userscript tools available today.
| Feature | LRO | Requestly | Resource Override | Charles Proxy | Fiddler | Tampermonkey |
|---|---|---|---|---|---|---|
| Price | Free | Freemium ($25/mo+) | Free | $50 license | $70 - $250 | Free |
| Type | Browser extension | Browser extension | Browser extension | Desktop proxy | Desktop proxy | Userscript manager |
| Chrome Support | Yes (MV3) | Yes (MV3) | Yes (MV2) | Via proxy config | Via proxy config | Yes (MV2) |
| Firefox Support | Yes (MV3) | Yes | Yes (MV2) | Via proxy config | Windows only | Yes |
| Edge Support | Yes | Yes | No | Via proxy config | Via proxy config | Yes |
| Manifest V3 | Yes | Yes | No | N/A | N/A | No |
| URL Pattern: Contains | Yes | Yes | Yes | Yes | Yes | Custom JS |
| URL Pattern: Wildcard | Yes | Yes | No | Yes | Yes | Custom JS |
| URL Pattern: Regex | Yes | Yes | No | Yes | Yes | Custom JS |
| Inline Code Override | Yes | No | Yes | No | No | Yes |
| Redirect to URL | Yes | Yes | Yes | Yes | Yes | Custom JS |
| File Upload Override | Yes | Yes | No | Yes | Yes | No |
| Header Modification | Yes (DNR) | Yes | No | Yes | Yes | No |
| API Mocking | Yes | Yes | No | Yes | Yes | Custom JS |
| Script/CSS Injection | Yes | Yes | No | No | No | Yes |
| Custom Status Codes | Yes | Yes | No | Yes | Yes | No |
| Rule Groups | Yes | Yes (Workspaces) | No | No | No | No |
| Import/Export Rules | JSON | JSON | JSON | XML | SAZ | JS files |
| Syntax Highlighting | CodeMirror 6 | Monaco | No | N/A | N/A | CodeMirror |
| Domain Filtering | Yes (suffix) | Yes | No | Yes | Yes | GM_match |
| HTTPS Interception | Via DNR | Via DNR | Via DNR | Requires cert install | Requires cert install | DOM only |
| Setup Required | None | None | None | Proxy + cert | Proxy + cert | None |
| Open Source | Yes (MIT) | Partially | Yes | No | No | Yes (MIT) |
| Offline Capable | Yes | Yes | Yes | Yes | Yes | Yes |
Tool Summaries
Requestly
Full-featured commercial tool with cloud sync, team workspaces, and session recording. Free tier is limited; paid plans start at $25/month. Built for enterprise teams but adds complexity for simple debugging tasks.
Resource Override
Lightweight extension focused on URL-to-URL redirects and inline code. Simple and effective for basic overrides, but lacks header modification, API mocking, and has not migrated to Manifest V3.
Charles Proxy
Desktop proxy application with powerful network inspection and SSL proxying. Requires installing a root certificate and configuring browser proxy settings. $50 one-time license. Overkill for simple JS override tasks.
Fiddler
Windows-focused desktop proxy (Fiddler Classic) with a newer cross-platform version (Fiddler Everywhere, subscription-based). Powerful but requires proxy setup and certificate trust. Not a browser extension.
Tampermonkey
Userscript manager for injecting custom JavaScript on page load. Excellent for persistent page modifications but cannot intercept/replace network requests, modify headers, or mock API responses. Still on Manifest V2.
Ready to try Live Resource Override?
Free, open-source, and built for Manifest V3.