Which browsers does the Emoji Add-on support, and are keyboard shortcuts available everywhere?

The Emoji Add-on works across multiple browser add-on stores (its install count is calculated as the sum of installs in all add-on stores), but keyboard shortcuts are only available in the Firefox version. If you rely on a hotkey to open the emoji picker, Firefox is the browser where that feature exists; in other browser versions you would use the add-on's on-screen interface instead. The default shortcuts are Ctrl+Alt+A on Windows and Linux, and ⌘+⌥+A on Mac, and they can be customised.

Browser support: what the site confirms

The site does not publish a per-browser compatibility table. What it does say:

• The project is distributed through multiple add-on stores, and the install figure is "calculated as sum of installs in all the add-ons stores."
• Keyboard shortcuts are flagged with a footnote: "This feature is available only in the Firefox version."

So the honest reading is: the add-on is offered in more than one store, but the only browser-specific limitation the site states is the shortcut restriction. It does not name every supported browser, so check your browser's own add-on store listing before installing if you need certainty.

Quick comparison

Keyboard shortcuts in detail

The shortcut feature lets you open the emoji picker without clicking the toolbar icon. Two things matter in practice:

1. Platform differences. The same add-on uses Ctrl+Alt+A on Windows and Linux but ⌘+⌥+A on Mac. If you switch machines, expect a different chord.
2. Customisation. The site says the shortcuts "you can anyway customise," so if Ctrl+Alt+A collides with another extension or app shortcut, you can rebind it.

If the shortcut does nothing after install, the first thing to check is whether you are actually running the Firefox version — that is the stated condition for the feature to exist at all.

Where to find the source code

The add-on is described as "totally free and open-source," with the source code on GitHub. The site does not print the repository URL in the provided material, so the reliable route is the project's own site or its add-on store listing, which typically links to the GitHub repository. Once there, you can inspect the code, report issues, or contribute — the developer, Saverio Morelli, explicitly invites user requests and translation contributions.

Other things worth knowing before you install

• Data handling. The site states no data is collected by the add-on and everything is saved locally on your device. Optional sync of settings and most-used emojis uses a Mozilla Account or Google Account.
• Emoji coverage. The add-on is described as constantly updated with the latest emojis, currently Emoji 15.1.
• Search. You can search by keyword, colour, or gender, and search in your own language (with an invitation to help translate languages not yet available).
• Convenience options. Auto-insert places a clicked emoji into the focused text box; auto-copy puts it on the clipboard, with a multi-copy option.
• Newsletter. The page mentions subscribing to a newsletter for a new Instagram account — this is a marketing sign-up, not a requirement for using the add-on.

Bottom line

Choose the Firefox version if keyboard shortcuts are part of your workflow; otherwise the add-on's core features (search, customisation, local storage, sync) are presented as available generally, with the caveat that the site does not enumerate every supported browser. Verify availability in your browser's add-on store before installing.