I faced problems when researching companies on the Glassdoor with the box message "Add your review or salary to continue using Glassdoor". The box was impossible to close and even if I could hide it using the AdBlock extension, the website itself was unscrollable. Using the browser's inspector I can write a simple script that can hide the box and allow scrolling, but I wanted to automate the process.
https://www.glassdoor.*/
Ctrl/Cmd + S
If at one point, the code does not work anymore - most likely the Glassdoor developers changed the DOM structure. Feel free to contribute a solution or create an issue and I will fix it.