Wikipedia:Bug reports and feature requests
Bug reports and feature requests (collectively called tasks) relating to the MediaWiki software that powers Wikipedia, should be filed on Wikimedia's Phabricator. Phabricator is a software suite that includes tools for bug reporting and project management. The bug report management tool of Phabricator is called Maniphest.
Bug reports and feature requests that are not directly related to the MediaWiki software should be discussed at Wikipedia:Village pump (technical). When in doubt, discuss issues at the Village pump before filing a task on Wikimedia's Phabricator.