Article View Metadata Javascript loop (It hangs!)

Hi all,
We are using OJS-2.4.6 and in the view Metadata page the browser hangs and says “The script is taking too much time…” with two options (stop/wait). Actually, in the console window the following error prints:
“Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help tiny_mce_gzip.js:58:2”
We can not see the page until stopping the script.
I decided to replace tiny_mce library of our installation with the 2.4.8, but it did not resolve the issue.
Any clues would be appreciated. Thanks in advance.

The problem is actually with the “tinyMCE” plugin when there is a ‘<’ symbol (less than) in the abstract field. Is there any way to update the tinyMCE plugin? If we disable the plugin the page loads correctly, but if the plugin is enabled it hangs and gets into an infinite loop that the browser asks to stop.
Is there any other thing to do other than disabling the plugin?

I finally figured out the answer. There are two solutions:
1- Disabling the tinyMCE plugin.
2- Put an space after and before the ‘<’ symbol in the abstract or any other field that contains this character.