On Monday September 25th from 10PM EDT - 12AM EDT (2AM UTC - 4AM UTC on September 26th), we will be performing system maintenance on the Firefox Accounts databases for two hours. During the maintenance window, there will be brief periods of a few minutes where users will not be able to login to their accounts. Please try again at a later time.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Error while attempting to run FireFox on Mac

  • 2 uphendule
  • 1 inale nkinga
  • 1 view
  • Igcine ukuphendulwa ngu SS1

more options

I need assistance with my mac. Each time I try to open up Firefox browser I’m alerted that I can not run two separate instances at once. Warning says Firefox is already runing and you can not run two versions at once

I need assistance with my mac. Each time I try to open up Firefox browser I’m alerted that I can not run two separate instances at once. Warning says Firefox is already runing and you can not run two versions at once

All Replies (2)

more options

Hello,

I am not completely sure if the commands translate, but I believe you can execute killall firefox to stop all running instances of Firefox.

more options

this didnt work however im loged into FireFox browser now so idk. i enteres killall firefox in terminal and it was unrecognized