Nowadays, almost all web pages use JavaScript, a scripting programming language that runs on the visitor's web browser.
JavaScript is a scripting language that can be used to embed small programs into an HTML document (website page) that make working with the HTML page easier and more beautiful.
Therefore, in order to see website pages colorful, with the full range of functionality, you need to enable using JavaScript in your browser.
Accordingly, if avaScript is disabled for some reason, the content or functionality of the web page may be limited or not possible at all.
Some sites ask you to enable JavaScript when loading, since without it the page will not load completely, if at all.
Here you can find instructions on how to enable (activate) JavaScript in the five most common web browsers.
Let's start with the browser that comes with Windows.
6 and above
To enable JavaScript in Internet browser Explorer, launch the Internet Options program.
This can be done by going through the menu: "Start - Control Panel - Internet Options"
Or from IE browser: Open the menu in the tab "Service → Internet Options" .
Or click on the icon "Settings" located at the top right
Open the tab " Safety" and select the zone " Internet » . Click the button "Another » .
Here you need to go to the section "Scenarios" and in the region "Active Scenarios" choose "Turn on".
If the window has a slightly different appearance, then on the “Security Settings” tab we allow scripting and execution of Java application scripts
To complete the process, click the button OK. If a confirmation window appears, click "Yes".
Personally, I have the English version of Internet Explorer installed by default, so I have problems with translation. So here are the instructions for users like me: o):
On your web browser toolbar, click the icon «
Tools" and select «
Internet Options".
Or on the tab « Tools" and select « Internet Options ».
In chapter « Internet Options" select tab « Security » .
On the tab Security click the button « Custom level... »
After opening the dialog box « Security Settings - Internet Zone » , see section « Scripting »
In chapter « Active Scripting » select item « Enable »
After the pop-up window appears «
Warning! »
which asks «
Are you sure you want to change the settings for this zone? »
click the button «
Yes »
.
In the window Internet Options click the button « OK » to close it.
Click on the button « Refresh" in your web browser to refresh the page.
Mozilla Firefox < 23
To enable JavaScript in the Mozilla Firefox browser, go to the menu "Tools - Settings"
Select a tab: "Content" - check the box opposite "Use JavaScript". And press OK.
I would like to note that as of version 23 of the browser, there is no option to enable/disable JavaScript in this menu.
Mozilla Firefox
Note. In Mozilla Firefox versions 23 and higher, you do not need to manually enable JavaScript; the option is enabled by default. To disable JavaScript, follow these steps:
- In the address bar, enter about:config and press Enter.
- Click the button "I promise I'll be careful..." if a warning message appears.
- In the search field, find javascript.enabled
- With the left mouse button, select the lines with the “default” value and click Switch. or double click the preference to change the value from "false" on "true".
For English version Mozilla browser Firefox:
- From the web browser menu, click and select "Options".
- In the Options window, select the tab "Content".
- Check the box "Enable Javascript".
- In the "Options" window that opens, click on the button "OK" to close it.
- Click on the button "Reload current page" web browser buttons to refresh the page.
To enable JavaScript in Chrome browser go to the browser settings - click on the “Menu” icon located at the top right:
Click the link "Show advanced settings" at the bottom of the page. 
Select an item JavaScrip t, and allow sites to use JavaScript, or prohibit it. You can also add exceptions for some sites here. 
For the English version:
Opera
To enable JavaScript in Opera browser, you need to select from the menu: "Settings - Quick Settings— Enable JavaScript"
Or on the menu Tools select item "General settings".
In the window that opens, go to the tab "Additionally". Select menu item "Content" and uncheck the boxes "Enable JavaScript" And Enable Java".
Well, for the English version:
a) Click on the button "Menu""Settings" then hover your mouse over the item "Quick preferences" and check the box "Enable Javascript".
B). If the menu bar is displayed, click "Tools", move the mouse cursor over the item "Quick preferences" and check the box "Enable Javascript".
Apple Safari
In your browser, click Safari - Settings ( or Click the icon in the upper right corner of the screen - depending on the browser version):
Go to the tab "Safety" and check the box next to "Enable JavaScript"
Or, according to the version, install in the section Web Content checkboxes Enable Java And Enable JavaScript
For the English version of the browser:
- In the web browser menu, click on the button "Edit" and select "Preferences".
- In the window "Preferences" select tab "Security".
- On the tab "Security" In chapter "Web content" check the box "Enable JavaScript".
Based on materials from uznaytut48.ru, www.enable-javascript.com, help.yandex.ru
Important: Javascript settings may change when updating your browser or installing a new one software or security patches.
I hope the information is useful :o).
If you use to surf the Internet Firefox browser, aka Mozilla, and periodically encounter problems loading videos, images, or lack of any response when you click on a button anywhere on the site, the confusion may be caused by the Java display settings in your browser. you can find out in this article.
What is "Java" and why your browser doesn't like it
Java is one of the most common web technologies today. The functioning of many websites and programs is based on it. Why isn't Java support enabled in the browser? Firefox refuses to support Java automatically because it considers it vulnerable to viruses. In the future, Firefox plans to completely stop supporting any plugins (tools for playing content) other than Adobe Flash.
But this policy of Mozilla regarding Java does not mean at all that when you turn on the corresponding plugin, a million malware. Sometimes you need to enable Java in Firefox for site performance reasons. This can be done in several ways.
Single case of Java enablement
Let's say you're surfing the Internet, find a video that interests you, and want to watch it. You click the Play button, but instead of playing, the following screen appears:
The only action you need to take is to click on the inscription. In addition, Firefox may prompt you to remember this site and always activate the Java plugin on it. If you trust this site, then confirm your choice in the dialog box (Allow and Remember).
In addition, sometimes application blocking comes from Java itself, and not from Firefox. In more modern Java versions There are a number of fairly strict requirements for launched applications. If the developer is unknown, then most likely the ability to launch a Java application will be blocked. Even if you decide to manually enable Java in Firefox by going to the security settings and selecting the desired site or application as an exception, the browser will still consider it suspicious and display a warning about a potential threat.
How to enable Java support in Firefox
There is another way to get to activating Java support. First, you need to go to the page with plugins (open the menu and select the “Add-ons” button or press the key combination Ctrl-Shift-A). A list of addons will open in front of you, among which we need to find the following:
If this plugin is not in the list, use the search bar in the upper right corner. You can search for the word Java - the search will return several add-ons from which you can choose the appropriate one, having first studied exactly what functions they are designed to perform.
If all of the above steps did not help you enable Java in Firefox, you may need to completely update the application on your computer. To do this you need to download latest version from the developer’s website and install it on your device. After this, try opening Firefox again and launching the problematic site or application. In the end, you can open a capricious site in another browser and see how it behaves there.
The latest browser update has caused Java connection problems for users of this program. Clearing the cache memory and other manipulations will not help in this case.
This is due to the fact that the Chrome browser no longer supports the legacy API module (NPAPI)
According to statements Google Previously used software modules caused frequent interruptions in the browser. Today there is enough content on the Internet that uses the Java plugin, so users need to connect an additional software module.
How to enable Java in Google Chrome
To enable Java in Google Chrome, run legacy NPAPI plugins. To enable NPAPI in Chrome, you need to follow three steps:
- Enter chrome://flags/#enable-npapi into the browser address bar
- Reload your browser.
After restarting the program, check the functionality of Java.
If the program does not work, you should enable the plugin on the chrome://plugins/ pageBy checking the “Always run” checkbox, the blocking of a specific module is removed.
When loading an Internet resource, the action of the application may be prohibited - this is symbolized by the blocking icon. To enable Java, you need to click on the icon and confirm the permission for the current page. There are two reasons if, after the above operations, Google Chrome plugins still do not start:
- Not installed software module. In this case, the browser will inform you that you need to install Java.
- Uses outdated Java in Chrome.
Do not forget that from version 45 in Google Chrome it will be impossible to use the modules discussed and no software will not help connect Java.
If the browser plays videos without problems, the sites are full of online applications and delight with various convenient functions - this means that the Java plugin is enabled and working normally. Java is used by most websites, so if they incorrect operation there is a need to figure out how to enable support for this technology.
For Google Chrome: enter the command “about:plugins” in the browser’s address bar. In the list of plugins, find Java and check its status. If “Enable” is displayed, click on it. When the plugin is enabled, the message “Disable” appears on the screen. To avoid having to confirm that Java is enabled in the future, check the box next to “Always Allowed.” You may encounter a situation where Java is not installed at all. Then you can follow the link and check it by clicking on the corresponding line. If the service detects the absence of a Java plugin, you will be prompted to download and install it. After successful installation, a request to enable Java will appear in the browser window, or you will need to enable it in the manner described above. For Mozilla FireFox: call the browser menu (top right of the screen) and go to the “Add-ons” section. In the window that opens, go to the “Plugins” tab and find the Java (TM) Platform programs already installed in the list. Set the Java operation option to Always Enable. If Java is not in the list of plugins, you must first install it using the link.For Opera: since this browser already has built-in Java components, it is enabled simultaneously along with all plugins. To do this, in the “Settings” menu, find the “Websites” tab, then activate the “Launch automatically” item in the “Plugins” section.
Many users have experienced difficulties with the lack of Java in new versions of the Mozilla Firefox browser. This is due to the fact that the developers have stopped supporting almost all plugins. Fortunately, you can always manually download and run a Java plugin. In this guide we will look at this process in detail.
Please note that the Java plugin cannot be installed and run on a 64-bit Mozilla versions Firefox.
Remember that JavaScript and Java are two different technologies.
Step 1: Download the Java Plugin
Launch Mozilla Firefox, go to the official Java website and click on the button Download Java for free:
Save the file and run it:
Step 2. Install the Java plugin
Choose Install:
We are waiting for the installation process to complete. If you already have old version plugin, a window will appear in which you can remove it by clicking on the button Uninstall:
The old plugin has been removed, click on Next:
That's it, the new version of the Java plugin is installed, click on Close:
Step 3: Enable Java
Restart the browser. Open the tab Tools → Add-ons:
In the tab Plugins are looking for Java(TM) Platform SE and set the value Always turn on:
Step 4. Adding sites to the exclusion list
Starting with Java 8, developers have implemented a standard that blocks many unsafe Java games and applications. If you still want to run them, you will have to use the exclusion list. To call it, open the menu Start → Control Panel→ indicate in search bar Java→ select Java Control Panel:
Switch to the tab Security and select the option Edit Site List:
Press the button Add:
We indicate the address of the web service or game that you want to launch bypassing Java security standards:
Click on Continue:
Click on OK V Java Control Panel. Now when you run this Java applet you will be asked to give permission. Click on the button Run to launch a game or web service.
