The exact symptoms: is your receipt printer a victim of the browser blocking?
This page describes precisely the failure caused by the "Local Network Access" restriction in Chrome and Edge on online POS systems. Compare it with what you are experiencing.
The full clinical picture
| Symptom | Present in this failure? |
|---|---|
| Clicking "Print receipt" → no reaction at all | YES — the main signature |
| No error message, anywhere (neither POS nor Windows) | YES — the blocking is silent by design |
| The Windows test page prints normally | YES — the printer is healthy |
| "It worked yesterday / last week" and you changed nothing | YES — the browser updated itself |
| Rebooting the PC, the printer, reinstalling drivers → no effect | YES — the problem is not there |
| A4 PDF printing or emailing the receipt still works | OFTEN — those paths do not use the local network |
| The printer shows a red light, a paper jam, a message | NO — if that is your case, it is a different (hardware) failure |
The affected setups
- POS software running in the browser (you open a website to ring up sales — "cloud" / online POS)
- Chrome, Edge, Brave or Opera — they all share the Chromium engine affected by the blocking. Firefox is not affected to date.
- Local receipt printer — mostly USB (Epson TM-T20, TM-T88, Star TSP, etc.), through a small printing utility installed on the PC by your POS vendor
- Windows 10 or 11, but also Mac — the blocking comes from the browser, not the operating system
Why the failure strikes "at random", store by store
Browsers only apply their updates when they restart. A checkout PC that stays on for weeks keeps its old browser… until the day it reboots. That day, the new version installs and the blocking activates. That is why your store can go down today while the shop next door, with the same hardware, "still works" — it is simply on borrowed time.
Does your case match? The fix takes 30 seconds and requires no technical skills.
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