Wikipedia:Suppress display of the fundraising banner
The Wikimedia Foundation's annual fundraiser includes banner ads that some find annoying, particularly after they have donated. The fundraising banner can be suppressed by logged-in editors (if you do not have an account, you may create one here). Once you are logged in, simply go to Special:Preferences, click on the Gadgets tab (far right) and check the option under the "Browsing" heading which reads "Suppress display of the fundraiser banner". Click "save" at the bottom of the page and refresh your browser.