I made this tool to solve a problem I had; I often use JLCPCB for PCB fabrication, but the site does not offer CAD data for their stocked components, instead they have links for their proprietary software Easy EDA.
So, to find CAD files for each part meant searching through different providers and downloading files from their website.
This drastically slowed down my workflow.
I designed this tool to grab the unique part number from the part page directly and then query the Easy EDA api and convert those files into kiCAD compatible output.
The software is based on another project by uPesy named EasyEDA2KiCAD, I rewrote the core logic of the program in javascript and packaged it into a chrome and firefox extension.
The tool is open-source and publicly available on both the Chrome Webstore and FireFox Addons.
View the souce code on Github.