I use Tails but not to do things online. Recently I ran across a program called YUMI (PendriveLinux.com) and installed the Tails ISO on it. I have YUMI installed on a USB flash drive and boot my otherwise Windows laptop to YUMI, then select Tails for booting. Nice thing about YUMI is you can install multiple ISO files to boot from and select one from a GRUB like menu. As noted, not all USB flashdrives will boot, although I may have been lucky in that I've never run into an unbootable one. The website has some suggestions on what works.