Before posting this question, I have made changes as describe in Security-Patches/SUPEE-8788. After make changes as described, now "Browse" and "Upload" buttons appears but it is not working. When I click on upload button it shows some progress bar but it appears as progress shows upload completed, it not move to above images gallery, it's look like something is still broken. Please let me know if some one have fix this issue in magento 188.8.131.52
I am sure this is a multi faceted beast but this may help:
System > Configuration > Advanced > Developer
Fixed - Image Upload issue after PATCH 8788 install of Magento version CE 184.108.40.206 - 220.127.116.11.
I was able to fix it,Please Follow following instruction.
Step >> 1: After installed security patch 8788 successfully, Please go to admin panel and flush all Magento cache. Then Logout your Admin Panel and Relogin to Admin Panel.
Step >> 2: Go to Index Management and select all reindex all data after flush all Magento cache once again.
Step >> 3: This very Important step, Delete your browser cache(Ctrl+shift+Delete) history clear all browsing data from browser including cookies.
Step >> 4: Go to Catalog >> Product Management , add new image of any product,now you can see everything work fine.