The Avant and Orca browsers support quick searching from the address bar. You can access the settings in the "Search Engine" dialog of the browser's options. There, you will be presented with two tabs: in the "Quick … See more

Firefox has Wikipedia listed as a default search engine and can be set to such. It also has a keyword search function which allows the search engine to be changed when a certain … See more

Search bar
Opera (version 9.5+) has Wikipedia added as a default search option from the search bar (to the right of the address bar).
Keyword
Opera includes a Wikipedia keyword by default. To use it … See more

Chrome, Chromium (the open source variant of Chrome), and Brave (a browser based on Chromium) all have an address bar can be … See more

The address bar in Microsoft Edge can be configured to search Wikipedia.
Navigate directly to the "Manage search engines" setting page by either:
1. Typing … See more

K-Meleon has a search button that can be used to search Google. You can change it to search Wikipedia instead, by doing this:
1. Close K-Meleon.
2. Open up prefs.js with a text editor. The file should be in your K-Meleon\Profiles\PROFILE_NAME\RANDOM_STRING.slt\ … See more

Version 8+ (OS X Yosemite and later)
Starting with Safari version 8, search Wikipedia by typing wiki <search term> into the … See more