A simple extension that reminds you to be mindful of every new tab you open
MindfulTab is meant for people who find themselves repeatedly opening a new tab without thinking, and mindlessly typing in something like Youtube.com and proceed to spend the next half hour there.
It adds a step in between which forces you to stop and think about why exactly you want to open the tab and pick a reason for it.
You can also create your own custom categories and start adding them to your new tab home page.