JavaScript Restrictor is a Chrome extension designed for increasing the privacy and security level of the user.

A JavaScript-enabled web page can access any of the APIs that a web browser provides. The user has only limited control, and some APIs cannot be restricted by the user easily. JavaScript Restrictor helps improve the user control of the web browser.

JavaScript Restrictor is similar to a firewall that controls the network traffic by controlling the APIs provided by the browser. The goal of this extension is to improve privacy and security while browsing. Additionally, Network Boundary Shield (NBS) prevents web pages from utilizing the browser as a proxy between the local network and the public Internet.

JavaScript Restrictor provides four in-built levels of protection:

0 - the functionality of the extension is turned off. All web pages are displayed as intended without any interaction from JavaScript Restrictor.
1 - the minimal protection level. Only changes that should not break most pages are enabled. Note that timestamps are rounded, so pages relying on precise time may be broken.
2 - intended to be used as a default level of protection; this level should not break any site while maintaining robust protection.
3 - maximal level of protection: enable all functionality

The user can add their levels suited for web pages they visit.

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