With the Safari web browser application already open begin by clicking on its SAFARI menu and select the PREFERENCES menu-item. Doing so will bring up its Preferences window (Fig 1.1) whereby you then need to click on its SECURITY Tab (mini window).
these options simply click inside their checkbox (rounded square). So if an option is already ticked (switched on), clicking inside its checkbox (rounded square) will
make its tick disappear thereby switching off (unticking) the option and making its checkbox empty. To switch an option back on again, and therefore makes its tick
reappear inside its empty checkbox, simply click inside its checkbox again.
When you have finished ticking (switching on) and/or unticking (switching off) one or more of the four main options close down the Preferences window, by clicking on its red eXit (Close) button located in its top-left corner, in order to apply/set your changes. Unlike the Microsoft Windows operating system, with OS X (Mountain Lion) there is no APPLY button or OK button to click on in order to apply/set your changes. With OS X (Mountain Lion) you just need to close the options window, which in this case is the SAFARI Preferences window; that is currently displaying the options of the SECURITY Tab. In some option windows the changes are made immediately, even without closing down its window, but this depends on which application/preferences window you are working with.
If you want to change your Cookie options you will first need to click on the PRIVACY Tab of the Preferences window. If you have since closed down the Preferences window simply open it again, by following the instructions at the beginning of this section, and then click on the PRIVACY Tab. From there you can BLOCK COOKIES - FROM THIRD PARTIES AND ADVERTISERS, BLOCK COOKIES - ALWAYS and BLOCK COOKIES - NEVER. The default (normally used) option is BLOCK COOKIES - FROM THIRD PARTIES AND ADVERTISERS, but you can change this by clicking on the radio (circle/dot) button next to your preferred choice. So if you wanted to use the option BLOCK COOKIES - ALWAYS, for whatever reason(s), you would simply click on the radio (circle/dot) button next to BLOCK COOKIES - ALWAYS.
Regardless of what option(s) you may or may not of changed; Close down the SAFARI Preferences window, Quit the Safari web browser application and then re-open it to make sure the changes you have just made have taken affect.
At the time of writing this section - March 2013 - OS X (Mountain Lion) has had minor Malware attacks because of Java vulnerabilities/flaws, to the point where certain
"so-called" authoritative websites have been scaremongering by stating you need to completely uninstall Java in order to protect OS X (Mountain Lion). This is generally
bad advice. Not just because certain applications rely on Java whereby completely uninstalling Java can cause them and OS X (Mountain Lion) to have side-effects, but also
because there have been no reports so far that the vulnerabilities/flaws have affected the main, core, parts of Java. So disabling Java from your web browser, at this time,
should be adequate enough action to stop Java malware attacks. A Java malware attack, put simply, means that a malware programmer has successfully found a way to insert
their bad code into a Java plug-in (web browser add-on/applet) that the Java engine is told to run (launch/execute). Once run the bad code does its nasty deed of damaging
your computer, e-mails and/or applications.
Preferences window, by clicking on its red eXit (Close) button located in its top-left corner, in order to apply/set your changes; Just the same as with the Safari
If you want to change your Cookie options you will first need to click on the PRIVACY Tab of the Preferences window. If you have since closed down the Preferences window simply open it again, by following the instructions above (Fig 2.0 onwards), and then click on the PRIVACY Tab. From there you need to make sure the FIREFOX WILL drop-down menu has the USE CUSTOM SETTINGS FOR HISTORY option (menu-item) selected. This will allow you to view and change the storage options associated with Cookies (Cookie files).
The ACCEPT COOKIES FROM SITES option, when ticked (switched on / enabled), means you want to allow all Cookies from all websites unless you have made any Exceptions to the rule. And the ACCEPT THIRD-PARTY COOKIES option, when ticked (switched on / enabled), means also allow Cookies from Third-Party websites associated with the website you are currently viewing.....but only keep them until: THEY (the Cookies) EXPIRE or UNTIL I (you) CLOSE FIREFOX. You can also use the ASK ME EVERY TIME option which means you will be asked about Cookie storage each time you visit a website. The default (normally used) option is REMEMBER HISTORY, which will automatically store Cookies (Cookie files) for each website you visit. More information can be found on this Firefox Support web page.
On the SECURITY Tab (below) you can change the settings (preferences/options) associated with blocking attack websites. You should leave those options ticked (switched on / enabled), especially the WARN ME WHEN SITES TRY TO INSTALL ADD-ONS option; Firefox will warn you when a website tries to automatically download/install an Add-On (Plug-In / Applet) to do with Java for example.
If you need to disable the Java plug-in (add-on), for whatever reason(s), you need to use the Firefox TOOLS menu and not the Firefox Preferences. So close down the Preferences window, if you still have it open, and then click on the Firefox TOOLS menu. From there, select the ADD-ONS menu-item (Fig 2.4 below) to bring up (display) the Add-ons Manager window (Fig 2.5) and then click on the PLUG-INS Tab. Plug-Ins and Add-Ons are more or less the same thing, so ignore the slight technical differences here and just continue by clicking on the DISABLE button to the right of the listed Java Plug-In.....
As you can see from the above; You can also disable or enable Adobe Flash plug-ins. So if you here of Flash malware attacks you might want to disable any Adobe Shockwave and/or Adobe Flash Player plug-ins as a precaution.
To get to the Advanced Preferences of the Google Chrome web browser application you need to scroll down to the end of the Preferences window and then click on the link called SHOW ADVANCED SETTINGS. Doing so will expand the Preferences window to reveal even more settings - The advanced settings (preferences).
With the Preferences window expanded, to reveal the advanced settings (preferences), you then need to scroll down the window until you see a heading called PRIVACY. When you have found it click on its CONTENT SETTINGS button to continue.
As you scroll down the mini window you will see the heading called PLUG-INS (Fig 3.4 below) whereby clicking on its DISABLE INDIVIDUAL PLUG-INS link takes you to its Plug-Ins window (Fig 3.5). From there you can click on the DISABLE link of a named plug-in (i.e. Java Plug-In) to disable it.
At the moment the Java Plug-In is installed and enabled, but still restricted - It does not have a tick inside its ALWAYS ALLOWED checkbox (rounded square), which means
Google Chrome will still ask you if you want it to download something or execute (run/launch) something in certain, uncommon, circumstances for example. In other words,
the installed Java plug-in (add-on) does not have full permission to do what it likes. You will still be asked to verify its actions such as downloading and/or running a
script/piece of code. If you want to disable it simply click on its DISABLE button.