: Do many users turn off cookies? Just how generally prevalent is it that users have cookies disabled in their browsers? I want to set a cookie during a user's session so that all the pages

@Sarah324

Quora has a good answer for this:


I imagine it's quite difficult to develop a study without significant
biases.

But here's one (A study of Internet users' cookie and javascript
settings) that found in a sample of 13,500 visitors to their
website 10% seemed to have 3rd party cookies turned off with only 3.7%
disabling all cookies. They also looked at javascript disabling, but
found few did that... even fewer during weekdays, presumably because
so many web-based applications require javascript. That study was done
in 2009.

This page (Percent of internet users who turn cookies off) from
2005 references a more formal report in 2000 that suggested back then
around 10% of users disabled cookies. They were shocked at how low it
was.

This page (How many people reject cookies?) references a report
in 2001 that put the figure much lower, around 0.7%.

This page (Study: Consumers Delete Cookies at Surprising Rate)
mostly talks about the frequency with which people delete cookies, but
also mentions a report that put the rejection of 3rd party cookies at
28%.

This page (Cookie & Tracking Technology Pages) breaks it down by
browser, saying the stats are from "last week" but it is unclear to me
if these are live stats that are updated weekly so "last week" could
mean anything. Of their 57,000+ sample size they found negligible
rejection of 1st party cookies and a 15% rejection of 3rd party
cookies.

This page (As Industry Confronts 'Do Not Track,' Startup Announces
Mobile Behavioral Ad Targeting Without Cookies) talks about a
study in 2005 which suggested 25% of users in their study block or
disable cookies, but I rather suspect they are referring to 3rd party
cookies.

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