Browser Game JS-Scripts Refresh and Update

I have two .js scripts for my browser game that need some updates and improvements.

- The first script is working but requires some refreshment on the multi-URL links. It also needs bug fixing and performance improvement.
- The second script, however, is not working as well as it should. It also requires an update, bug fixing, and performance improvement.

The ideal freelancer should be experienced in:
- Updating and improving Java Script (JS) scripts
- Previous experience with tampermonkey, greasemonkey, and browser extension compatibility
- Strong attention to detail to handle bug fixing and performance issues.
- Able to work quickly and meet the ASAP deadline.

Please bid for the project if you possess the necessary skills and experience.