Hi - Does Firefox for Android support and implement by default a safe browsing API like Firefox Focus? (https://support.mozilla.org/en-US/kb/safe-browsing-firefox-focus) Yes it applicable to all Firefox Browsers settings on '''about:url-classifier''' - Does Firefox for Android or Firefox Focus support Secure DNS as the desktop version? If so are these enabled by default? No, you can enable it on Phone under Private DNS on settings - Does Firefox for Android or Firefox Focus preloads pages while using a search engine in order to increase browsing speed? Firefox doesn't cache sites for First time when you open the app for second time it is faster,However you can enable it through '''Web Archives Add-on'''. Add-ons are not available for Firefox Focus - Does Firefox for Android saves Auto-fill form data? If so, how can this data be deleted again? currently no for standard built but for '''nightly built ''' can save address and more information in web forms. It remembers only your login and password if you save it. It will be available on future Builds - Most browsers block in their Site settings "Pop-ups and redirects". Firefox for Android blocks pop-ups and Firefox Focus does not block them. Although I could not find any information regarding the "redirects" aspect. Is Firefox on mobile Devices allowing those? redirects are not blocked unless it is a sites in list of malicious site provided & maintained by google and Mozilla. popup and auto play are blocked by default on Firefox. Firefox focus supports pop up blocking by default