This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

when i close firefox a screen asks if i want to cancel or delete LSO's. What are they

  • 1 baphendule
  • 1 inale nkinga
  • Igcine ukuphendulwa ngu cor-el

more options

i can't find any info on my question in the help section or the getting started page.are LSO's cookies and if i cancel them is it not harder or slower getting back to the page? what is the definition of LSO.

i can't find any info on my question in the help section or the getting started page.are LSO's cookies and if i cancel them is it not harder or slower getting back to the page? what is the definition of LSO.

All Replies (1)

more options

Flash cookies are usually referred to as LSO:


Do you have the Better Privacy extension (Tools > Add-ons > Extensions) ?