It is very easy To Set Favicon In Your Bogspot Blogger Account.Firstly you just upload one image or favicon icon in your site.Then follow the instruction....
01.Login to your blogger account
02.Click on Design
03.Click Edit HTML
Then you search " <title><data:blog.pageTitle/></title> " (Ctrl+F)
04. Bellow the " <title><data:blog.pageTitle/></title> " you paste your
<link href='favicon image url' rel='shortcut icon'/>
05.Then click SAVE TEMPLATE
ok..DONE
For example>.....
<title><data:blog.pageTitle/></title>
<link href='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-fF8Nh-r0aWVo4wqFMS_dJebUTuepaN9h7D15EVYqtXLRXIlKwv2qZxxOIIjvQ1Tc-GWYW2WYsQPFJJLFDdUGRh9bCRfhGYKmYANtpzl3nEG_ykrHS57Oeb89LBANHgi-YwWvX2iyCYHo/s400/messi+wallpaper.jpg' rel='shortcut icon'/>
01.Login to your blogger account
02.Click on Design
03.Click Edit HTML
Then you search " <title><data:blog.pageTitle/></title> " (Ctrl+F)
04. Bellow the " <title><data:blog.pageTitle/></title> " you paste your
<link href='favicon image url' rel='shortcut icon'/>
05.Then click SAVE TEMPLATE
ok..DONE
For example>.....
<title><data:blog.pageTitle/></title>
<link href='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-fF8Nh-r0aWVo4wqFMS_dJebUTuepaN9h7D15EVYqtXLRXIlKwv2qZxxOIIjvQ1Tc-GWYW2WYsQPFJJLFDdUGRh9bCRfhGYKmYANtpzl3nEG_ykrHS57Oeb89LBANHgi-YwWvX2iyCYHo/s400/messi+wallpaper.jpg' rel='shortcut icon'/>