Can I use
?

contenteditable attribute (basic support)

- LS

Method of making any HTML element editable.

Chrome

  1. ✅ 4 - 153: Supported
  2. ✅ 154: Supported
  3. ✅ 155 - 157: Supported

Edge

  1. ✅ 12 - 153: Supported
  2. ✅ 154: Supported

Safari

  1. ✅ 3.1 - 26.6: Supported
  2. ✅ 27: Supported
  3. ✅ 27.1 - TP: Supported

Firefox

  1. ❌ 2: Not supported
  2. ◐ 3: Partial support
  3. ✅ 3.5 - 157: Supported
  4. ✅ 158: Supported
  5. ✅ 159 - 161: Supported

Opera

  1. ✅ 9 - 134: Supported
  2. ✅ 135: Supported

IE

  1. ✅ 5.5 - 10: Supported
  2. ✅ 11: Supported

Chrome for Android

  1. ✅ 154: Supported

Safari on iOS

  1. ❌ 3.2 - 4.3: Not supported
  2. ✅ 5 - 26.6: Supported
  3. ✅ 27.0: Supported
  4. ✅ 27.1 - 27.2: Supported

Samsung Internet

  1. ✅ 4 - 29: Supported
  2. ✅ 30: Supported

Opera Mini

  1. ❌ all: Not supported

Opera Mobile

  1. ❌ 10 - 12: Not supported
  2. ✅ 12.1: Supported
  3. ✅ 80: Supported

UC Browser for Android

  1. ✅ 15.5: Supported

Android Browser

  1. ❌ 2.1 - 2.3: Not supported
  2. ✅ 3 - 4.4.4: Supported
  3. ✅ 154: Supported

Firefox for Android

  1. ✅ 157: Supported

QQ Browser

  1. ✅ 14.9: Supported

Baidu Browser

  1. ✅ 13.52: Supported

KaiOS Browser

  1. ✅ 2.5: Supported
  2. ✅ 3: Supported

This support only refers to very basic editing capability, implementations vary significantly on how certain elements can be edited.

Resources:
Blog post on usage problems
WHATWG blog post
MDN Web Docs - contentEditable attribute
WebPlatform Docs