Internet, Networking, & Security Browsers How to Disable JavaScript in the Opera Web Browser Block it in just a few steps on some or all sites by Scott Orgera Writer Scott Orgera is a former writer who covering tech since 2007. He has 25+ years experience as a programmer and QA leader, and holds several Microsoft certifications. our editorial process Facebook Twitter Scott Orgera Updated on October 13, 2020 Browsers Chrome Safari Firefox Microsoft Tweet Share Email Disabling JavaScript can improve browser speed and performance. Opera users who wish to disable JavaScript can do so in just a few easy steps. This tutorial was created for users running Opera version 63 on macOS, but the steps are virtually the same for Opera in Windows, macOS, and older Mac operating systems. Select Opera from the menu bar, then select Preferences. Opera's Settings interface will display in a new tab. In the left-hand menu pane, select Advanced. Select Site Settings. Select JavaScript. Slide the Allowed toggle to the left. The toggle button will gray out, and JavaScript will now be blocked on all pages. In addition to this all-or-nothing approach, Opera allows you to specify whether to allow JavaScript on specific web pages, entire sites, or domains. These lists are handled in the Block and Allow sections, located below the aforementioned toggles. Select Add to add a site to the Block or Allow list.