ZDNet: “I’ve been a fan of Firefox for a long time. However, a few years ago, I dropped it as my default browser because I found its tab management lacking. On top of that, the browser was missing some other UI customizations. Plus, it’s been nearly four years since the Firefox developers implemented a major tweak to the UI, which means Firefox is getting a bit stale. That’s why, when the developers of Zen Browser reached out to me, my interest was piqued. Zen Browser is based on Firefox ESR 128. But for those who don’t know, Firefox ESR is an extended-release candidate, which means it’ll be supported for much longer than the standard release. What Zen Browser does with Firefox is impressive because it brings it almost in line with my favorite browser, Arc.  Zen tweaks Firefox by making use of a sidebar but also (and finally) adding better tab management via Workspaces similar to Opera’s. That feature alone makes Zen Browser superior to Firefox (and a worthy option to replace my current default)…Zen Browser includes the following improvements to Firefox:

• A highly customizable UI
• Vertical tabs
• Split views
• Workspaces for improved tab management
• Customizable sidebar
• Zen Glance (similar to Little Arc)
• OCSP enabled
• HTTPS only mode
• Zen Mods to add even more features..”