The Fix Require Modules plugin for Obsidian enhances the experience of working with JavaScript and TypeScript by fixing limitations related to module imports within Obsidian. It allows users to seamlessly work with custom JavaScript/TypeScript scripts, including those used in Dataview, Templater, and other plugins. The plugin introduces advanced functions like `require()` and `requireAsync()` for both desktop and mobile, making it possible to import modules and work with files from relative paths, system paths, and even URLs. Additionally, the plugin offers improved support for ECMAScript and TypeScript modules, making it easier to integrate and develop scripts in a modern development environment.