The author of this thesis aims to analyze and develop a prototype of a software responsible for showing how the specific web application would be displayed by the concrete device. First, the problem of diversity of devices for accessing the web and of the level of support of modern web technologies is explained to the reader. Then the thesis offers a way how to help developers with testing across web browsers on different hardware. The analytical section describes the methods the author would like to use for accomplishing the goal, and also the set of suitable technologies. The penultimate section shows the manner the author implemented the prototype of the software. The Software is then subjected to tests showing that the prototype meets the requirements.

This master thesis deals with the topic of browser extensions, their environment and analysis. The goal is to describe the extensions environment, online Webstores, that offers extensions and to show best practices for analysis and optimization of its extensions and their assets. Within the thesis you can find very precise analysis of online Webstores for Google Chrome extensions and Mozilla Firefox add-ons. Conclusions are made based on this analysis that include special characteristics of the previously mentioned browsers. The master thesis consists of two parts, theoretical and practical. The theoretical parts deals with the description of the browser extensions environment and it presents specific characteristics about online Webstores and browser extensions to the reader. In the practical part the thesis is focused on objectives set by the thesis and it presents the results of the Webstore analysis and description of the universal Google Analytics solution that helps developers to analyze their extensions The thesis contributes to the topic mainly with the precise description of the browser Webstores and extensions environment, best practices and recommendations and by creating the universal Google Analytics solutions for the developers.

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Users of internet browsers are constantly monitored, without their consent. By using the JavaScript APIs, it is possible to obtain various information about the browser, which together form a browser fingerprint, which can then be misused. Therefore, the goal of this work is to use a robust fingerprint protection solution of Brave browser and port it to the JavaScript Restrictor extension. In this work, the problematics of obtaining an fingerprint and countermeasures in the Brave browser are analyzed and then compared with the current protection in the JSR extension. The method of porting of Brave's countermeasures is presented and subsequently the procedure of implementation of these defense elements into the browser extension is described. The resulting implementation has been tested and evaluated, with the new protection appearing to be effective.

This Master's thesis was written to create the extension for an experimental rendering engine CSSBox about scripting support in JavaScript language. In the theoretical section the thesis describes the architecture of the rendering engine and introduces problems of the scripting in HTML documents according to the recommended HTML 5 specification. This thesis deals with thorough analysis of existing scripting engines and their interfaces, which could be used for the extension implementation. Depending on the knowledge gained from the previous parts this thesis focuses only on the scripting engine Rhino and introduces an abstract design of its integration into the CSSBox project. At the end it evaluates the reliability and efficiency of the implemented functionalities and considers possibilities of their further development.

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The goal of this work is to create a model of a platform for an application development provided that this platform is implemented in PHP. Applications are built by connecting of functional modules according to desired properties. The run of these applications is provided by the platform.

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Целью работы является разработка фреймворка для создания веб-браузерных расширений. Объектом исследования является класс программных средств для автоматизации и упрощения работы разработчиков с веб-браузерными расширениями. Методы исследования включают: анализ, сравнение и обобщение данных о существующих способах автоматизации разработки веб-браузерных расширений; апробация современных WEB-технологий. Магистерская диссертация содержит 4 главы. В первой главе описаны основные теоретические аспекты предметной области. Вторая глава содержит анализ и описание средств разработки. Третья глава посвящена описанию процесса разработки фреймворка. В четвертой главе представлено описание возможностей фреймворка. Результатом работы является разработанный фреймворк для создания расширений веб-браузера. / The aim of the work is to develop a framework for developing web browser extensions. The object of research is a class of software tools for automating and simplifying the work of developers with web browser extensions. Research methods include analysis, comparison, and generalization of data on existing methods for automating the development of web browser extensions; approbation of modern WEB-technologies. The paper contains 4 chapters. The first chapter describes the main theoretical aspects of the subject area. The second chapter contains an analysis and description of development tools. The third chapter is devoted to describing the framework development process. The fourth chapter presents a description of framework capabilities. The result of the work is the framework for developing web browser extensions.