Delay when getting back to Yetiforce tab on Firefox

[vslonska]

Hello,
When we use our instance of Yetiforce on Firefox, there is an important delay (up to 3/4 seconds) during which the browser freeze, each time we go back to Yetiforce tab from another tab. It's the only website who does that (I have a lot of other tabs opened and I can navigate between them without delay).

I noticed that it's on any computer, various Windows or Linux computers, but always with Firefox.

Do you know what can do that and how to solve it ?

Thanks,