Adding functionality to Lingq Extension
bamboozled

The official API documentation is here: https://www.lingq.com/apidocs/
It is incomplete and out of date, but that may not matter if you only want to modify the official LingQ extension. If I understand correctly you are interested in improving the web scraping functionality of the LingQ extension? That would be cool, feel free to share your results.
I don't think you can expect much support here, as far as I know the developers don't browse the forum. Also, from what I hear, the extension is only used by a tiny fraction of the userbase and therefore not high priority at LingQ.
vernmartin

Are looking for developer documentation to develop your own extension, or are you just looking for information about the existing extension which is here: https://www.lingq.com/lingq-importer-chrome-extension/
The extension works very well in MS Edge as well