Custom HTML5 Tag <fieldset>

Hi everyone, I was wondering if it is possible to use <fieldset> tag directly within Webflow? I am working with MixItUp plugin which requires Filters to be placed inside <fieldset>. Right now I have it as <Aside> tag so I can manually change it after downloading my project but I was hoping to do it via webflow.

Here is my site:
https://preview.webflow.com/preview/suff2?preview=06c421b33132f724446102582d9d42e5

I also have another post in design help re sticky menu.
http://forum.webflow.com/t/sticky-section-similar-to-webflow-forum/28111

If someone reading this has any ideas on how to do it, I will greatly appreciate it.

Thanks.

Yes you can, with the embed code component.

Thanks @samliew, i just ended up tinkering with javascript to make it work. I’m not a coder so it all looks alien to me but still as long as it works, I’m not complaining.

Do you have an idea on how to do sticky section thing i mentioned above? I know the answer will be quite simple but its seriously making my head hurt trying to think of it.

Thanks.