Munawar, sorry but it's not quite clear. 

First of all it has nothing to do with the browsers.

As far as we've understood from your last reply - the problem is that some users can send virtual gifts without paying credits for them, but others cannot.

-- If so, do you have additional account types and user roles on your site? Does the 'Send gift' action is unchecked for all roles?

-- If not, please describe the problem once again and provide us with the steps on how to reproduce this issue

The fact is that since we neither can see the problem on your site nor reproduce it at our demo site - we cannot assume the exact reason of the problem and cannot find a solution. So, the more details you provide - the more effective our assistance will be.

Also, please explain the way you want this feature to work. Do you want all user to pay for gifts or can send gift for free? 

but in the setting standard members must have to pay to send gifts 

Munawar, If one member can send free gift and another cannot do that - this means only one thing that these members differ from each other. 

Do all these standard members have the same role? Is the 'Send gifts' action disabled for all roles?

Please make sure that all these standard members do not have credits on their balance. 

Also, could you please check whether all standard members can see the price under a gift, but one standard member can send a gift and system does not take credits, but when another standard member sends a gift - the system takes credits.