i made a browserextension for chrome i want to share here. Its just basic but allows the configuration of additionell searchparameters in its options. Their presets can be edited in options.js.
It uses a server (server.py) on
http://localhost:5000 to pass the parameters to everything. This server must run in the background and is not being started automatically. i made also an exe version of server.py with pyinstaller, which is IMO easier to handle, but i cannot include it here since virustotal classifies it as malicious.
There is a textfile in the zipfile of the package which describes the installation and usage in detail (the credit goes to ChatGPT..)