Gaming · Windows & macOS
How to Fix the 'Open Roblox Protocol URL' Launch Prompt
Source-checked About 10 minutes
Answer
From Roblox.com, select Play, then choose the official Roblox handler. On Windows, choose Roblox; in Firefox on macOS, choose Roblox.app and Open Link. If the handler is missing or loops, reinstall from Roblox.com. Do not use a registry file or protocol fixer.
Verify where the prompt came from
Open the intended experience on https://www.roblox.com and select its green Play button. Continue only when the address bar is Roblox.com and the prompt names Roblox; close any unrelated page offering a launcher or protocol fixer.
Install the official player when it is missing
If the browser says Roblox is not installed, sign in at Roblox.com, open an experience, select Play, and run the installer Roblox presents. When installation finishes, return to that experience page and select Play again.
Confirm the handler on Windows
In Edge, Chrome, or Firefox on Windows, select Roblox in the application prompt and confirm. Remember the choice only on your own computer; the experience should open in Roblox rather than another downloaded program.
Choose Roblox.app in Firefox on Mac
In Firefox, check Always use this application to open roblox-player links and choose the app. In Finder press Command-Shift-G, enter /Applications/Roblox.app/Contents/MacOS/Roblox.app, select Roblox.app, then choose Open Link.
Verify the handoff
Wait for the selected experience to open in Roblox and reach its loading screen. If the browser remains on the website, try the same Play button once more before changing settings.
Reinstall a missing or looping handler
If no Roblox application is available or Roblox repeatedly asks to install, close other Roblox processes and follow Roblox Support's reinstall instructions for Windows or macOS. Retry Play from Roblox.com after the official installation completes.
Use support when the loop remains
If the clean installation still loops, follow Roblox's desktop troubleshooting and report the browser, operating system, and exact prompt to Roblox Support.
Optional sponsored tool
A VPN cannot install or repair Roblox's protocol handler and is not required for this fix. The original tutorial's optional PrivadoVPN link remains below; Tech How may earn a commission at no extra cost to you.
Video walkthrough
If it does not work
- If a remembered choice opens the wrong application, do not edit the registry or install a browser extension; reinstall Roblox from Roblox.com and select the official app at the next prompt.
- If Roblox opens but the experience does not load, the protocol handoff succeeded; record the new in-app error and use Roblox's desktop troubleshooting instead of repeating the browser prompt steps.
- On a school or work computer, an administrator may block external protocol handlers; request authorized installation rather than bypassing the policy.
Sources and verification
Checked against official documentation on . Scope: Windows, macOS.
Roblox documents the browser-to-player handoff, the exact Firefox macOS application path, and supported reinstall recovery. The retained video is supplementary; the optional VPN below does not install or repair a protocol handler.