Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

חיפוש בתמיכה

יש להימנע מהונאות תמיכה. לעולם לא נבקש ממך להתקשר או לשלוח הודעת טקסט למספר טלפון או לשתף מידע אישי. נא לדווח על כל פעילות חשודה באמצעות באפשרות ״דיווח על שימוש לרעה״.

מידע נוסף

"Error: TypeError: Preferences.get is not a function" keeps popping up when opening Firefox.

  • 4 תגובות
  • 3 have this problem
  • 1 view
  • תגובה אחרונה מאת cor-el

more options

The replies to previos inquiries by other users don't explain how to fix problem, they just say to open safe mode.

The replies to previos inquiries by other users don't explain how to fix problem, they just say to open safe mode.

כל התגובות (4)

more options

What is your homepage? (Web page which open first, with Firefox)

more options

This issue can be caused by an extension that isn't working properly.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe mode start window or otherwise make changes.
more options

It opens with Google as the homepage.

more options

Do you have the "Default Tab" extension?

  • Tools > Add-ons > Extensions