Top 10 useful Mozilla tools for developers

Web Developer

The Web Developer extension adds various web developer tools to the browser.


Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse.
You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page

DOM Inspector

Inspect the DOM of HTML, XUL, and XML pages, including the mail…

SQLite Manager

Manage any SQLite database on your computer.

JavaScript Deobfuscator

This add-on will show you what JavaScript gets to run on a web page, even if it is obfuscated and generated on the fly.
Simply open JavaScript Deobfuscator from the Tools menu and watch the scripts being compiled/executed.

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Remove Text Formatting from Gmail – Copy/Paste – Tips and Trick

When we copy a text from a web page or other source and paste them in a Gmail,the formating of the original text would be same.Some times it may be annoying we need it to be normal.In Gmail there is a simple way by just selecting the text’s and clicking the button ‘Tx'(as in image below) would format the texts to normal format.

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How to make all content visible in a cell – Wrap Text Microsoft Excel

When we type some long text in a excel column it would overlap the other columns.To avoid this and make the full content visible there is a  Microsoft office excel tip.

UnWarpped Text
Select the cell(s) to wrap.
click on Home Tab Wrap Text.
We can also see the Microsoft help describing the Wrap Text feature in excel.
That’s it.Now the cell is fully visible in the Excel 2007 file.

How to Convert a Rows to Columns – Columns to Rows in Excel

There are times we need to convert excel rows to columns.Excel inbuilt has a option to do this in easy steps.

Rows to Columns

Step 1 : Select the all rows to be converted as columns and copy them.

Copy rows in excel

Step 2 : Click in any empty cell and right click and select  Paste Special option from it.


Step 3 : A popup could come, from it check Transpose.


That’s it.See the result.

Rows to Column

The same steps applies for converting columns to rows.

How to Check if someone else is using/hacked my Gmail account

Gmail gives a secure feature to monitor and protect your email account.It provides you with latest 10 IP address that you have logged into the account.By this you can check is some else have logged in your Gmail account.And also it provides the current open location of your Gmail account.

To check these details scroll down your email page you would notice the “Last account activity” label and the Details link.

Click on details link to check the IP addresses from where the gmail account was accessed.There is also a “Sign out all other sessions” button which would logout all the other open locations.

It is better to immediately change your password and security question,to ensure no would further use your account.

By this feature Gmail helps us to protect your account from hackers.

How to prevent browser from caching a page in rails

I used devise for authentication in my rails project. After I signed out; I clicked the back button in the browser; Oh!!! the browser was showing the previous page from which I clicked ‘sign out’.  I tested this and found that the browser is caching the page.

I used firebug to analyze the project page(s). I found that the

no-cahe is added

To add ‘no-cache’, I added the following lines @ the application_controller.rb file

before_filter :set_no_cache

and the function

def set_no_cache
response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"

Restarted the server and found that after I signout and hit ‘back button’ of the browser; the page is redirected to the sign_in page. [ I have configured devise to redirect to sign_in when the session is not valid].

Hope this helps rails users like me.

and I analyzed the rails project page(s) using firebug andThe firebug analyzed results

no-cache implemeted

How to share files between Linux systems

Even for a newbie, the Giver application will be very helpful in sharing files between Linux systems. Giver has been hosted in Google code. Its easy to install and very easy to use. I will explain you how to install and use Giver. I am using the application in Ubuntu 10.04.


  1. Open the ‘Terminal
  2. Enter the following command. sudo apt-get install giver
  3. This will install the application under Applications -> Internet menu

Use Giver

  • Applications -> Internet -> Giver or enter ‘giver‘ in the terminal
  • Giver application showing the list of Recipients for you

This opens up the Giver and you will see Giver iconGiver Icon in the notification area in the notification area

  • The Giver window will show the list of computers in which Giver is running currently.
  • To send a file to a computer. click on that computer from the list, will popup a menu asking either to send a file or folder.
  • Choose necessary option to show the Open dialog box, [ I am choosing ‘Send a file’ ]Choose the file and click open.
  • The user in the selected computer will be prompted to either accept the file or decline.
  • After ‘Accept’ button is clicked, the file transfer gets started. once transfer is done both the users were notified.

Sender will be intimated with Successful transfer message

  • You can configure ‘Giver’ where to save the files received; by opening up its preferences. Default location is user ‘Desktop’
  • To open the ‘Preferences’, right click on the Giver icon in the notification area and select ‘Preferences’ Open Giver Preferences
  • The Preferences dialog box will open. You can change your giver name to be displayed for all your recipients, your profile picture and the location where all your received files/ folders are to be stored. After configuring click ‘Close’

How to Verify an Email address is valid Or Check if an Email address is available?

At times you would want to verify the sender is valid or not of the mail received.And also you may want to check an email address is available or already taken.VerifyEmailAddress helps us to do them.

Just go and type an email address you want to check.

It Verifies the email id and gives the result as valid or invalid email address.

Invalid Check Result

Valid Check Result