Oh come on, stop this mythology about unsafe IE from big bad company like Microsoft.
The truth is that no browser is safe, and no, I am not IE user.
FireFox was safier at the beginning, just because it was not popular enough to attract such activities.
Some time ago, I typically went to read some website on FireFox, and guess what?
I did not download or run anything, just reading a website, having antivirus Kaspersky and latest security updates, and boom (!), my Windows has been broken and I had to resintall it.
How does it happen?
Well, FireFox had security bug that allowed websites to run system commands directly in links which you click, something like a href="format c: /y".
And no, that was not the only security bug in FF, so even if it can be safe today, it may not the other day with another update.
Since this situation, I started to use browsers in sandbox.
As about new GOG website.
I personally do not like it, while I liked the older design much.
First, it is somehow broken for me (on latest Chrome), and even if I have English language as chosen, I see most parts of the website in german (I do not live in germany and I do not know this language).
I did not notice such problem on other websites for years.
Secondly, its less readable for me now.
I visit main website everyday to see whats new, and now news are at total bottom, and only latest 3.
There is a lot of unused space on both sides, especially right side when reading single game page, including system requirements that is on bottom with other things now, making a lot more scrolling, and ... where are GOG user lists?