- conditionally add menu item - place of preview link is under Open Link in New Private Window - .accesskey = r - buildLinkPreviewMenu -> handleContextMenuClick - add context menu test - add more context menu conditionals, don't show it for non-link menus - fix spacing in browser-context.inc - fix tests by setting browser.ml.linkPreview.prefetchOnEnable to false Differential Revision: https://phabricator.services.mozilla.com/D247404