A browser extension is a plug-in that extends the functionality of a web browser.
 Some extensions are authored using web technologies such as HTML, JavaScript, and CSS.
 Others are developed using machine code and application programming interfaces (APIs) provided by web browsers, such as NPAPI and PPAPI.
 Browser extensions can change the user interface of the web browser without directly affecting viewable content of a web page; for example, by adding a browser toolbar.
A userscript (or user script) is a program, usually written in JavaScript, for modifying web pages to augment browsing.
 They are enabled in browsers by use of a userscript manager browser extension.
 Userscripts are often referred to as Greasemonkey scripts, named after the original userscript manager Greasemonkey for the Firefox browser.
 On Wikipedia, a userscript feature is enabled for registered users that allows them to install userscripts to augment editing and viewing of the encyclopedia's pages.
Fluff Busting Purity, or FB Purity for short (previously known as Facebook Purity) is a web browser extension designed to customise the Facebook website's user interface and add extra functionality.
 Developed by Steve Fernandez, a UK-based programmer, it was first released in 2009 as a Greasemonkey script, as donationware.
 It is available for Firefox , Google Chrome , Microsoft Edge , Safari, Opera and the Maxthon Cloud Browser .
Stop Tony Meow is a browser extension which replaces photos of former Australian prime minister Tony Abbott with images of cats and kittens on websites.
 Initially created for Google Chrome, the extension was expanded to Safari and Firefox later in 2014.
 The extension was created by developers and designers Dan Nolan, Ben Taylor and Matt Kelsh.
GNU LibreJS, or simply LibreJS, is a free software web browser extension for Mozilla Firefox-based browsers, created by the GNU Project.
 Its purpose is to block nonfree nontrivial JavaScript programs and allow free or trivial JS in a user's web browser.
 The add-on was created to address the so-called "JavaScript Trap" described by Richard Stallman, a situation in which many users unknowingly run proprietary software in their web browsers.
HTTP Switchboard is a Chromium browser extension (which also works with other Chromium-based browsers such as Opera (from version 15) and the Yandex browser) that allows filtering of Hypertext Transfer Protocol  (HTTP) requests based on the content and/or the target's domain name.
 It comes with an optional, pre-defined blacklist of hostnames that might be a privacy threat when sending requests to them and/or a security threat/annoyance due to the content delivered in the response.
 HTTP Switchboard's developer, Raymond Hill, has also developed other browser extensions, including ad filtering uBlock which he actively leads as uBlock Origin.
Anthony John Abbott (born 4 November 1957) is an Australian politician who was the 28th Prime Minister of Australia, from 18 September 2013 to 15 September 2015.
 Abbott was leader of the Liberal Party of Australia from 2009 to 2015, and has been a member of parliament for Warringah since 1994.
Ghostery is a privacy and security-related browser extension and mobile browser application.
 Since February 2017, it is owned by the German company Cliqz GmbH (formerly owned by Evidon, Inc., which was previously called Ghostery, Inc.).
 It is distributed as proprietary freeware.
 The code was originally developed by David Cancel and associates.
Yahoo Axis was a desktop web browser extension and mobile browser for iOS devices created and developed by Yahoo.
Turn Off the Lights is a free browser extension developed by Stefan vd.
 It is available as a plugin for Microsoft Edge, Internet Explorer, Mozilla Firefox, Google Chrome, Opera, Safari, Maxthon and Yandex Browser.
 There is also a Turn Off the Lights bookmarklet for other browsers.

Question: What party was led by the person who was targeted by the browser extension "Stop Tony Meow"?
Answer: the Liberal Party of Australia