RedRain is a Chrome extension developed by tailor.dharmesh. It falls under the category of Browsers and is listed as an Add-ons & Tools subcategory. The program allows users to open links to local files in Google Chrome, which is disabled by default.

One of the main features of RedRain is its ability to execute the window.open function from within an iframe, even across different origins. This functionality is disabled by default in Chrome, but with RedRain, users can enable it and open local files using the window.open function.

In terms of security, RedRain ensures that a malicious page cannot open a local file without the user's permission. The extension only reacts to the user's click operation, providing an additional layer of protection.

It is worth mentioning that RedRain does not collect or use any personal information. Additionally, the source code of the extension is released on GitHub, providing transparency and allowing users to review the code if desired.

Overall, RedRain is a useful Chrome extension for those who need to access local files and want to enhance their browsing experience.