You buy it once, you use it on as many pages as you like, and you can have your money back if it did not do what you expected.
Buying Gloss gives you a personal, non-exclusive, non-transferable licence to use the extension on as many devices as you like, for as long as you like. You may not redistribute the extension, resell it, or offer it as part of another product.
Every update is included, for as long as the extension is maintained. There is no subscription and no expiry.
If it did not do what you expected, write to me within 30 days of buying and I will refund it. No form, no questions, no "contacting support" queue — one person reads the email.
Gloss is provided without warranty of any kind. The dictionary is Princeton's WordNet and is used under its own licence; the extension ships that licence with it.
Gloss does not transmit the pages you read, and claims no rights in them.
Last changed: 20 October 2026.