section 1 (with video) deos not load firefox

Hello,

I have the site https://www.koroniostours.com

The problem is that the home section of the site which has a youtube video does not load at all on firefox.
If i refresh loads.

This maybe is happening because i have changed the index.php and have made the loops for i (see the loop in the line below)

for( $i = 0; $i < $section_num ;$i++)

take values for $section_content hardcoded.

I mean ,for example, for ($i=0;$i < $section_num ;$i++)
{$section_content=’ my code ‘}

Can you please advice me, what i can do to make it load correctly all the times?

Thank you.

Regards.