Web Browser Support - Optimizely CMS 12

Exam Area: Area 1 – Product Knowledge (15%)

1. CMS Edit View Browser Support

The Optimizely CMS Edit UI supports:

Note: CMS 12 uses modern web APIs and does not support IE11.

2. Website Visitors (Frontend)

Browser support for the frontend depends on the developer's implementation:

• CMS only renders HTML/CSS/JS → the developer decides
• Use CSS/JS features compatible with target browsers
• Modern CMS 12 sites typically target evergreen browsers

3. TinyMCE Browser Support

TinyMCE 5.x (used in CMS 12):

• Chrome 71+
• Firefox 78+
• Edge 79+
• Safari 14+

Review Questions

1. Does CMS 12 Edit View support IE11? (No – IE is not supported)
2. Which browser is recommended for CMS editing? (Chrome or Edge Chromium)