Firefox add-on with keyword - hover

New Tab Override allows you to set the page that shows whenever you open a new tab.

Zoom images/videos on all your favorite websites (Facebook, Amazon, etc). Simply hover your mouse over the image to enlarge it.

Press on the toolbar button to see the magnifying glass.

Preview YouTube while hovering mouse over a YouTube link on any website

https://github.com/alexcodito/KnockoutContextHover KnockoutJS Context Hover - Development and debugging assistant for Knockout JS

Hover over a link and hit Y to yank (copy) it like a real vim user! For feedback, a pop sound will be played after copying.

Shows Laconic text when hovering on a TV Tropes link.

Easy and lazy way to peruse all Reddit comments and replies for a post, just by hovering over the comments link.

Linkover loads link thumbnail, page title, description and favicon, and shows it all in a nice tooltip on link hover.

Show a popup when hovering over MyAnimeList links displaying info about the anime with a button to add it to your Plan to Watch list

Show large shot preview on hover. Supports images, gifs and videos.

Preview links in nested tooltips without leaving your tab.

Hover, click or select to translate (with text-to-speech). Translator.

Display a linked image in a fullsize overlay on mouse hover.

Copies the Roblox App Hover functionality.

Switch to hovered tab without clicking in Tree Style Tab.

Lets you expand/collapse twitch sidebar(left following / recommended section) on hover.

Click to copy text directly by hovering and clicking on any element.

Firefox extension to copy links on hovering using Ctrl+C.

Shows the card image after mouse hover for MTGCardFetcher bot on Reddit.

Quickly translate Japanese by hovering over words. Formerly released as Rikaichamp.

This extension will show a bigger version of images on EDHREC when they are hovered over.

One click to close any overlay popup on any website. Use keyboard shortcut Cmd+Shift+X (Mac OS X) or Ctrl+Shift+X (Windows / Linux).

Move tabs between windows via the context menu.

Double-click any image to download it quickly and quietly, or use the Hover Button!