Windows, Chrome, Qwant: user can override safesearch by manupilating url

[sfrauenfelder]

When using Chrome 64-bit on Windows, and using qwant.com, the user can override safe search by manupilating the url.
Adding "&safesearch=0" to the url, it displays unsafe results.

For other browsers and search engines, the extension checks the url; at least for Windows, Firefox&chrome, and duckduckgo. Please do something similar for chrome+qwant.