While creating an entry in uBlock origin for the sidebar with the contacts I fired the developers tool on firefox and notice the entries
CryptoWorker start b3d84ba5-2f9c-419b-b555-f8d8c4024d5b:1:68170
CryptoWorker start b3d84ba5-2f9c-419b-b555-f8d8c4024d5b:1:68170
CryptoWorker start cbab8426-c9ae-44fd-9b77-e6858fc7cfae:1:68170
CryptoWorker start cbab8426-c9ae-44fd-9b77-e6858fc7cfae:1:68170
CryptoWorker start e8360a4a-aae4-493c-afa9-ff19753fae18:1:68170
CryptoWorker start e8360a4a-aae4-493c-afa9-ff19753fae18:1:68170
the version reported of Telegram is Telegram WebK 1.9.0 (395)
using Firefox 116 64-bit on ubuntu 23.04