NOTE: Before installing Java make sure you kill killall -9 /opt/firefox/firefox-bin You can download java from the official website. I followed the instructions here and it worked: Some web page features such as buttons that change when they're clicked or images with zoom capabilities may not work properly while others may not work at all.Do you want the JDK or the JRE? Anyways, I had this problem too, a few weeks ago. 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? If the "javascript.enabled" is set to "true," then your JavaScript is working correctly. Firefox ESR (Extended Support Release) is an official version of Firefox that doesnt come with the latest features, but instead focuses on security and stability fixes.
Type in "javascript" into this search bar. As you type this, every JavaScript-based setting appear. 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. How do I enable Java on Firefox Linux Navigate to Menu > Add-ons > Plugins > Oracle JAVA, Search Java(TM) Platform, If Java is disabled, click on Never Activate to open its drop-down menu and select the option to activate Java. Find the javascript.enabled row under the Preference Name heading. Select the Java plugin (s) and click disable.
Click the Show All button at the top of the browser window. Open Firefox and click the Firefox button -> Add-ons (Tools -> Add-ons in Linux, OS X and Windows XP). On the following page, click the 'Accept the Risk and Continue' button. Copy the following then paste it into the Firefox address bar: about:config Hit the Enter key. In the Security tab of the Internet Options window, select the Internet zone and click the Custom level button. It powers most of the dynamic features you see on web pages, including button clicks, navigations, and form submissions. Open a new Firefox browser window or tab. To do that, launch Internet Explorer and click or tap its Tools button in the top right corner. JavaScript is a popular programming language that's essential for modern websites to function correctly on Mozilla Firefox. Why do I need JavaScript enabled on Mozilla Firefox?