A browser build is a product decision
Exporting a Unity project to WebGL is easy. Delivering a browser game that people will actually wait for is a different problem.
A good WebGL release starts with budgets: compressed download size, decompressed memory, first interaction time, and the amount of work the browser must do before showing meaningful progress.
Stage the experience
The page should load before the game. It can explain controls, check the device, and fetch the Unity loader only when the player chooses to launch. That keeps ordinary game pages fast and crawlable while giving the build a focused environment.
Compression headers also matter. Brotli files served with the wrong encoding do not merely load slowly; they can fail completely.
Measure the real journey
Useful events include launch intent, loader success, loader failure, and play duration. Together they reveal whether players reject the page, abandon the download, or reach the game and stay.