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If you have JavaScript disabled, most of what makes these websites work won't load in your Firefox browser. The use of JavaScript on your Firefox browser is virtually crucial because it enables the best use of modern websites such as Gmail, Facebook, YouTube, and more. What happens if I disable JavaScript on Mozilla Firefox? Click Java (TM) Platform plugin (Windows) to select it. In the Add-ons Manager window, select Plugins. In the Security tab of the Internet Options window, select the Internet zone and click the Custom level button. From the Firefox menu, select Tools, then click the Add-ons option. To do that, launch Internet Explorer and click or tap its Tools button in the top right corner. If the "javascript.enabled" is set to "true," then your JavaScript is working correctly. Open the Firefox browser or restart it, if it is already running. For users using Google Chrome 42 to 44, manage to add Java plugin to Chrome via the search bar. For users using Google Chrome 41 or older, try to activate Java in Chrome plugin settings.
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Type in "javascript" into this search bar. As you type this, every JavaScript-based setting appear. Then check the following information to see if your Google Chrome still supports the Java plugin. On clicking the "Accept the Risk and Continue" button, a search feature will appear. To do that, simply input "about:config" into the Address Bar of your Firefox browser and press the Enter key on your keyboard. Next, accept the warning about changing advanced settings by clicking the "I'll be careful, I promise" button. On Mozilla Firefox, JavaScript is enabled by default, but you can check it reasonably quickly to verify if it is working correctly. How do I know if JavaScript is working on Mozilla Firefox? In fact, it should only take you only a minute or so to complete. Enabling JavaScript in your Firefox browser is an easy process. It powers most of the dynamic features you see on web pages, including button clicks, navigations, and form submissions. Click or double-click the Firefox app icon, which resembles an orange fox around a blue globe. BTW, I am using Firefox 2.0.0.4, but I have never seen Java fail to work on any version of Linux when the plugin shows up in about:config. JavaScript is a popular programming language that's essential for modern websites to function correctly on Mozilla Firefox. What's really involved is Firefox and Java, regardless of the CentOS distribution level. Why do I need JavaScript enabled on Mozilla Firefox?