I use Tor Browser as my only browser for many activities, from Twitter to reading news stories. For the most recent in the unending stream of reminders that many organizations want to build databases of your interests, we should all look at last week's Dreamhost mess: https://www.dreamhost.com/blog/we-fight-for-the-users/
You never know which website is going to attract attention next, and where you'll wish in retrospect you had used protection.