I press ctrl+L (keyboard focus to location bar) type "w aviation" and press enter.
It's built in already as a default feature. To add a custom search to Firefox, right click on the search field and click "Add keyword for this search". I chose "w" for Wikipedia like you have.
Chrome does this more simply, but the feature is less discoverable. you don't have to create the keywords manually, you just hit tab after entering the URL where the search box is located. since the URL is autocompleted, for frequently used websites this is a matter of typing the first two or three characters and then hitting right arrow.
You can also set up custom short codes for search engines in Chrome. I use gh for GitHub and w for Wikipedia for example. Just type gh space react and use the keyboard navigation on github to navigate further. A lot of keyboard enabled sites have set up ? key for help about keyboard commands.
Alternatively, in any browser, set DuckDuckGo (or Qwant, or another search engine with !bangs support) as your default search engine, then press Ctrl+L and type `!w aviation` - or `!npm some-package` or `!wt dictionary word` or `!g google search term` etc.
Firefox has had this feature for many many years.
I press ctrl+L (keyboard focus to location bar) type "w aviation" and press enter.
It's built in already as a default feature. To add a custom search to Firefox, right click on the search field and click "Add keyword for this search". I chose "w" for Wikipedia like you have.