As of Today March 15th 2017, you can no longer search hashtags via web browser UNLESS you are logged into Instagram. If you are not logged in, and click the links below, you will get the error "Sorry, this page isn't available."
This makes things much more anoying!
I also hate the new update where you cannot hover your mouse over a picture to see the engagement. You now have to actually click each picture making the process more time consuming.
Use other websites such as www.websta.me since you can search hashtags, and also see the likes of each picture without the need of clicking each one.