Production answer · browser support
Which browsers should be tested before a real label job?
Use a current Chromium, Firefox, or Safari/WebKit browser with JavaScript, IndexedDB, Blob downloads, Web Crypto, and service workers. Test the exact browser, operating system, printer workflow, and device used for production.
Why this matters
Automated coverage can catch regressions across engines and viewport sizes, but it cannot reproduce every driver, privacy setting, extension, storage policy, or printer dialog.
A reviewable sequence
- Run the sample workflow in the intended browser.
- Reload to confirm local persistence.
- Export and restore a checkpoint.
- Open and print the passive proof at actual scale.