in the Play Store, is still available on the app's website. Users can download the .apk file directly and install it as a third-party app if they allow "Unknown Sources" in Android settings. The application page as of December 2017 features the Adblock Browser for Android instead of the original app. Adblock Plus was made available for Internet Explorer in August 2013, Safari since January 2014, and Yandex Browser since December 2014. An Adblock Plus browser beta version was made available in May 2015, called the "Adblock Browser". Adblock Browser 1.0 was released on September 7, 2015, based on Firefox for mobile. Adblock Plus has created an independent board to review what is an acceptable ad and what is not. Operation Like Mozilla's built-in image blocker, Adblock Plus blocks HTTP and HTTPS requests according to their source address and additional context information and can block iframes, scripts, and Flash. It also uses automatically generated user stylesheets to hide elements such as text ads on a page as they load instead of blocking them, known as element hiding. Android On rooted devices, the Android app blocks ads on all web traffic including mobile networks. For non-rooted devices, ads are only blocked through a Wi-Fi connection and requires the user to set up a local proxy server for each network in order for the app to function. The app uses a local proxy server to intercept web traffic and remove ads before showing content to the user. Most of the content that users are trying to block will be removed, though some content is missed and the app is not as reliable at blocking ads as the browser versions. The app can be configured to auto-start every time the device reboots, minimizing the action required by the user. Filters Basic filter rules can include wildcards represented by asterisks (*). Sites and objects can be whitelisted with filters that start with two at signs (@@). Regular expressions delimited by slashes (/) can be used by advanced users. Adblock Plus also supports a more-sophisticated syntax that gives fine-grain control over filters. An example of the sophisticated filtering would be wikipedia.org##div#centralNotice, which will hide the centralNotice element used by Wikipedia to display donation requests. The first part of the filter is the domain name, followed by two pound signs, and a CSS selector. This type of filtering is called cosmetic filtering, as it hides parts