unable to attach file in gmail but successfully ataching them in other browsers
all of a sudden i m not able to upload anything via firefoz rather it be gmail attachment or dropbox or 4shared or sendpace but i can do it via other browsers and no i dont face these issues while downloading
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Hi haris.ahmad, Thank you for your question, I understand that adding an attachment to gmail in Firefox is not working for you. After testing this on a new profile on a Windows 8 machine and did not have any troubles. However, this does not mean there is not an issue. In order to further investigate what may be causing this issue. In the past there was pop up that came up to add an attachment to gmail. Can you please also check to make sure that gmail is added to the pop up exceptions list: Pop-up blocker settings, exceptions and troubleshooting
Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that turns off some settings, disables most add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- In Firefox 29.0 and above, click the menu button
, click Help 
and select Restart with Add-ons Disabled.
- In previous Firefox versions, click on the Firefox button at the top left of the Firefox window and click on Help (or click on Help in the Menu bar, if you don't have a Firefox button) then click on Restart with Add-ons Disabled.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
- On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
- On Mac: Hold the option key while starting Firefox.
- On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help others with the same problem.
You may have to add an allow exception for pop-ups for the Gmail website to make this work.