Some Problems

Hi i really enjoy this browser but i see some problems. Chrome or opera extensions are not working and i not see any video downloader plugin or button. What is the problem? I tolerate them because first releases always new and it has got some problems. Please take a look.

There is no problem.
The SafeZone browser is not Chrome nor Opera.
It is a different browser.

https://www.avast.com/faq.php?article=AVKB209#idt_130

I realize but i use other chrome or opera based browsers and they allow any install chrome or opera extensions. Avast browser need add this function

I suggest you also read the SafeZone Browser Frequently Asked Questions topic in this sub forum, https://forum.avast.com/index.php?topic=183597.0.

You are making a mistake.
There are no browsers based on Chrome or Opera.
Browsers are based on a engine, not on another browser.

I believe it is a bad idea to allow extensions in the SafeZone Browser unless they have been checked by avast first.
If every extension simply would be allowed it means that also extensions with security issues (and malicious ones) can be installed and that would make the safety implementations of the browser basically useless.

I already find it a bad thing that it allows Flash.
Flash is very well known for the security flaws.
And besides that, Flash is history.
Adobe is not gonna develop it anymore and is abandoning it.
Several browser developers already have announced that there will be no flash support in future versions.
Things should be done within the HTML5 standard.