Is it possible to make product builders and my products page, additional information box to close from back button?
I have page when click under product it popups box with additional information, I would like to be able to close it with back button. Because I always click back when I want to close the popup and it just leaves the product page to previous page.
HI @ankkax 
this may be feasible it highly depends on the theme and if any apps, external-embeds, etc are making the popups.
Roughly any related javascript would need to be changed to update the url, probably to just a hash fragment, and add that to the history api
https://developer.mozilla.org/en-US/docs/Web/API/History_API
not to be confused with the navigation api https://developer.mozilla.org/en-US/docs/Web/API/Navigation_API
The HOW is an advanced customization beyond the scope of the forums.
If your asking multiple questions including “possible to make CPB product builder” then yes that is also possible , product-personalization customizations or apps are very common.
If you need this customization explored then contact me for services
Contact info in forum signature.
ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.
store is https://hyotyvoima.fi/pages/products and when you click the “lisätietoa” button under the product you get the popup window, if its ok I could send you an email.