When ever I go to block section, the page freezes

When ever I go to block section, the page freezes suddenly after few time, I should refresh the page every time it freezes and by refreshing it goes back to the my project page. What should I do now?
I am using Google Chrome.
I had 20,000++ blocks.

Your project is too big for Chrome, and possibly for any other browser.

Try Firefox, for temporary relief.

Learn to use lists and tables, and see

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