signTextJS plus sɣur JaSP

3,3 n yitran ɣef 5

9 n yiceggiren

Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 14046479, pred 8 rokmi
es la primera vez
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 14013012, pred 8 rokmi
Es la primera vez
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13999126, pred 8 rokmi
signText running...
Please consider using signTextAsync.

Close this window when signing has finished.

I see in console:
unreachable code after return statement [Learn more]
ClientScriptA.js:2782:28
SignText: Unknown encoding 'windows-1251'
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13987041, pred 8 rokmi
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13962702, pred 8 rokmi
Yettwasezmel 2 ɣef 5
sɣur Celyo, pred 8 rokmi
After update to Firefox 59 an error occurred every time I'm trying to sign an order.

This is the error:

signText running...
Please consider using signTextAsync.

Close this window when signing has finished.
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13829993, pred 8 rokmi
No se tofavia
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13770617, pred 8 rokmi
Yettwasezmel 2 ɣef 5
sɣur Aseqdac Firefox 13713534, pred 8 rokmi