You will need to use a userscript manager such as Tampermonkey to use this script. This is still in Beta. Please report feedback/suggestions/bugs on Github. To install the userscript, go to aopsenhanced.user.js and Tampermonkey will install it for you.
To use the userscript, simply go to [https://artofproblemsolving.com/enhanced] or click "AoPS Enhanced" on the "Resources" dropdown at the top. You can currently only use the "Settings" page and the "Delete Backup" page (I will publish AoPS Enhanced Backup soon), but I will add more pages soon.
Some of the code for this userscript comes from: