/Firefox-Tab-Preview-On-Hover

Enable Firefox Tab Preview Thumbnail when Hovering over an inactive tab.

Firefox-Tab-Preview-On-Hover

Enable Firefox Tab Preview Thumbnail when Hovering over an inactive tab.

Steps:

  1. Open a new tab and enter the following in the address bar and press enter:
  about:config
  1. Search for browser.tabs.cardPreview.enabled and turn it to true.
  2. Search for browser.tabs.cardPreview.showThumbnails and turn it to true.
  3. Search for browser.tabs.cardPreview.delayMs and set time delay.

Ba-boom!

SOURCES:

Finally Tab Previews is available on 123