簡単にタブ切り替えが設置できて良いのですが、concrete5 8.5.4でPHP7.3.16で使ってみたところ、/packages/quick_tabs/blocks/quick_tabs/view.phpの16行目を少し変更しないとエラーがでます。
$class=$class+" editmode";
↓
$class = (int)$class + (int)" editmode";

※追記
このサイトを Concrete CMS の Ver.9 にアップデートしましたが、普通にそのまま使えています。

Does not work with c5 8.5. When you edit a page with Tabs, the editor crashes

Nice addon but you need to watch the video to learn about "sandwiching"

The Tab view works nicely on a desktop/laptop. But, The mobile view does not work on a mobile device. I started a support request 3 months ago & I'm still waiting.

I love this add-on. It is almost idiot-proof and mostly just works. The tabs look good and disappear on mobile. A big thank you to Vivid for making this!

A quick note: I have had some small issues getting blocks to display in the correct tab and not in others. I solve this by placing each tab & associated blocks in their own layout section. Not a big enough deal to remove a star.

Extremely simple to use. Much appreciated for making the available to all.

Although generally i'm not fond of video tutorials, for Simple Tabs is takes just one review and that's it... It really uncluttered some of my pages.

Easily installed and foolproof. I mean this needs no documentation. Plus this is logically responsive, the tabs go away on a mobile view. Perfect!

Very easy to use and can be configured easily by clients who are less than tech savvy. Support was given quickly and fixed the problem.