Google Inc.

Elysa Wesley Fenenbock

Timothy Wong O'Connor

Craig Lawrence Warner

Ronit Kassis

Luke Stone

A method and system provide, using a microprocessor of computing device associated with a web publisher, content including a web page. The method includes accessing, by the web publisher, a list including at least one extension associated with a web browser rendering the content at a second computing device, and a key generated based on the content, the key being generated at a specific time after the providing. The method includes comparing a value associated with the key to an expected value to determine a difference between the key and the expected value.

System for managing extension modifications to web pages

A system includes a processor configured to execute a web browser in a first browser execution process initiated by an operating system of the system. The system includes a browser extension installed in the web browser, the browser extension including a markup language file and a file specifying at least one type of action related to a page element on which the browser extension seeks to act. The web browser may be configured to receive a set of rules from a web publisher associated with a first web page prior to rendering the first web page, determine based on the file, without loading the browser extension, that the browser extension is configured to implement a first action prohibited by the set of rules, and restrict the browser extension from implementing the first action on the first web page.

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San Francisco, CA, United States of America

Elysa Wesley Fenenbock