Yes, we do. Heatmap from Mozilla [1], accompanying blog post [2].
Participants had to opt-in, the study collected data for five days from 9,667 people.
7.3 percent of all participants clicked the RSS button at least once in those five days. That places it behind the favicon (those seem to be accidental clicks [3], 9%), the Go button (11.4%), as well as the New Tab button in the tab bar (12.7%) and in front of the New Tab button in the toolbar (not displayed by default, 5.2%) as well as the Site Identity button for websites with SSL (4.8%).
A participant clicked the button 0.3 times on average, the 9,667 participants clicked about 3,000 times. Since we know that 7.3 percent of all those participants clicked the button, we also know that those who clicked the button did so about four times on average.
[3] If a website doesn’t use SSL, clicking the favicon does nothing in Firefox except displaying a short note that the current website doesn’t use SSL. Since only 4.8% click when a website actually does use SSL (and when the favicon turns into the Site Identity button which is clearly identifiable as such) the majority of those who click on the favicon when it doesn’t look like a button which will display information about certificates seem to be clicking accidentally. Clicking the favicon selects the whole URL in some other browsers (Safari, Chrome, I don’t know about Internet Explorer) so my suspicion is that many of those 9% expect Firefox to do something similar. (I would and it drives me crazy.)
Participants had to opt-in, the study collected data for five days from 9,667 people.
7.3 percent of all participants clicked the RSS button at least once in those five days. That places it behind the favicon (those seem to be accidental clicks [3], 9%), the Go button (11.4%), as well as the New Tab button in the tab bar (12.7%) and in front of the New Tab button in the toolbar (not displayed by default, 5.2%) as well as the Site Identity button for websites with SSL (4.8%).
A participant clicked the button 0.3 times on average, the 9,667 participants clicked about 3,000 times. Since we know that 7.3 percent of all those participants clicked the button, we also know that those who clicked the button did so about four times on average.
[1] https://heatmap.mozillalabs.com/mozmetrics/
[2] http://blog.mozilla.com/metrics/2010/07/01/firefox-main-wind...
[3] If a website doesn’t use SSL, clicking the favicon does nothing in Firefox except displaying a short note that the current website doesn’t use SSL. Since only 4.8% click when a website actually does use SSL (and when the favicon turns into the Site Identity button which is clearly identifiable as such) the majority of those who click on the favicon when it doesn’t look like a button which will display information about certificates seem to be clicking accidentally. Clicking the favicon selects the whole URL in some other browsers (Safari, Chrome, I don’t know about Internet Explorer) so my suspicion is that many of those 9% expect Firefox to do something similar. (I would and it drives me crazy.)