Browser extension into pages. Researchers have identified 50,870 Google Chrome extensions and 34,407 programs that injected ads. Thirty-eight percent of extensions and 17 percent of programs were catalogued as malicious software, the rest being potentially unwanted adware. Browser extension 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
History of the web browser 1996, Bernd Richter ceased development, stating "let Microsoft with the ActiveX Development Kit do the rest." Microsoft, which had thus far not marketed a browser, finally entered the fray with its Internet Explorer product (version 1.0 was released 16 August 1995), purchased from Spyglass, Inc. This began what is known as the "browser wars" in which Microsoft and Netscape competed for the Web browser market. Early web users were free to choose among the handful of web browsers available, just as they would choose any other application—web standards would ensure their experience remained largely the same. The browser wars put