https://askubuntu.com/questions/994803/meaning-of-t-canonical-in-firefox-url-after-search https://askubuntu.com/questions/994803/meaning-of-t-canonica... Answe

https://askubuntu.com/questions/994803/meaning-of-t-canonical-in-firefox-url-after-search https://askubuntu.com/questions/994803/meaning-of-t-canonica... Answer there quotes a source that is deleted: "The t=mageia is intentionally added in the search configuration, as Mageia gets a tiny amount of money donated to it from duckduckgo for making it the default search engine in most of the browsers."