The best thing about Firefox is that just when you think you know everything there is to know about the browser, something new comes along and surprises you. Here are few hidden tips and tricks. Maybe these are old hat and you know them already. Or maybe you had no idea these could be done. Lets see how many of these you know already.
1. Open docx file using Firefox without Office 2007: Now, you can view docx files using Firefox by installing OpenXMLViewer which is available for Windows, Mac and …

When entering a password credential into a password secret field on web page or form, normally the password is masked as asterisk so that no other people that happens to be around the computer will be able to read or view the password entered. So how to make sure and verify that password typed is correct? There are various programs to reveal the hidden asterisk password, however, View Passwords Bookmarklet proves to be easier.
View Passwords Bookmarklet is a JavaScript (JS script) that can be saved as a favorite or bookmark, …

Firefox displays a confirmation dialog box with a short delay when you install an extension preventing you from mistakenly confirm the install providing adequate time to review the install information, this is a very good security feature and prevents several cleverly crafted arbitrary code execution holes.
However if you are an advanced user and would like to disable or decrease the install dialog box delay, follow the steps below:

Type about:config in Firefox address bar and press Enter.
Type security.dialog_enable_delay into the filter box, and hit ENTER as shown below.

Double-click and change the …

By default Firefox’s in-line spell checker does not work in all text-boxes and forms and you need to right-click and select “Spell check this field” to manually start spell-check, however this behavior can be automatically activated by following the steps provided below.

Type about:config in your Firefox address bar and press Enter.
Type layout.spell in filter text box.
Change the value to 2 as shown below.

As usual when I was screening through all the new posts in forum to see if there are any spam and also any computer topic that I can help, I saw an interest question asked by Rizzano. He wanted to know if there is anyway to make Firefox auto save password without clicking the Remember button. In Firefox, even if you have the option “Security Remember passwords for sites” checked in Tools > Options,the browser will still display a notification bar at the top that asks “Do you want Firefox …

I have a bunch of single-use Gmail accounts for the usual things, like account registrations, site administration, newsletter subscriptions and the like. If you have this same situation, you know that (unless you possess unusual patience) it’s not easy to serially open up multiple Gmail accounts if you have saved the login information for an auto-login. Oh, and forget trying to have multiple parallel Gmail accounts signed in, it’s one-by-one or nothing. Well, until now, that is.
I recently found Gmail Manager for FireFox, an extension that displays your Gmail accounts …

Firefox only (Win/Mac/Linux): Firefox extension Download Manager Tweak customizes your downloading options, from docking the downloads window in the sidebar to changing the appearance.
Once you’ve installed the extension, head over to the Add-ons panel and open the Download Manager Tweak Options pane. From there, you’ll be able to customize just about everything in the downloads window, from the buttons that show up on the toolbar to setting a delay before the download manager opens. If you like controlling every aspect of your browsing experience, this is an add-on that might …

Firefox can securely save passwords you enter in web forms to make it easier to log on to websites. By default the option “Remember passwords for sites” option is enabled but you will still be asked whether to save passwords for a site when you first visit it. Clicking the Remember button will save the login information, Not Now button to ignore it or Never for This Site, that site will be added to an exceptions list and will never prompt you to save the username and password for that …

For convenience sake, many users tend to store or save their log in name and password in some websites, email account, forum, etc with their browser in the sign-on database file in encrypted format. With the stored username and password, users can speed up the log in process without having to type in again. Storing log in username and password in the browser generally poses quite high security risk to users. Essential data or info might be leaked out under some circumstances, for instance, when laptops get stolen, sharing the …

open any webpage and copy & paste the following content in the address bar and see what happens
javascript: i=0;c=["red","green","blue","yellow","magenta","orange","black","white"]; a=document.links;setInterval(‘i++;a[i % document.links.length].style.color=c[i % c.length]‘,10);void(0);