SeaMonkey, alternative Linux à Mozilla Firefox

Mis à jour le 18 octobre 2026

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SeaMonkey is a functional but dated alternative to Firefox. It is not a direct 1:1 replacement for power users who rely on modern web standards or extensive add-on ecosystems. It suits users who want a single, lightweight suite for basic browsing, email, and simple HTML editing without managing separate applications. If you need the latest WebGL support, current extension compatibility, or seamless cross-device sync, stick with Firefox. SeaMonkey is best for minimalists who prefer an all-in-one tool and do not require cutting-edge web rendering.

Couverture fonctionnelle60%

Licence: MPL-2.0
Prix: Gratuit
Dernière version: 2.53.24
Note: —

Installer SeaMonkey

Ce qui fonctionne pareil

Both are free, open-source browsers based on the Gecko engine.
Both support tabbed browsing and standard bookmark management.
Both include built-in password managers and cookie controls.
Both allow customization of toolbars and themes.

Ce qui change

SeaMonkey lacks native support for the modern Firefox Add-ons ecosystem.
SeaMonkey does not offer built-in, real-time cross-device sync for tabs and history.
SeaMonkey bundles email, news, and HTML editing, which Firefox does not.
SeaMonkey's rendering engine may lag behind Firefox in supporting the latest web standards like WebGL.

Ouvrir vos fichiers Mozilla Firefox

SeaMonkey can import bookmarks and passwords from Firefox using standard formats like HTML or CSV. You can export these from Firefox and import them into SeaMonkey. However, browser profiles, extension data, and session states are not directly compatible. You will need to manually recreate your extension setup and re-login to services, as there is no direct profile migration tool between the two.

Passer de Mozilla Firefox à SeaMonkey, étape par étape

Export bookmarks and passwords from Firefox as HTML or CSV.
Install SeaMonkey from your Linux distribution's package manager.
Import the exported files into SeaMonkey via the settings menu.
Reinstall any essential extensions that are compatible with SeaMonkey.
Configure email accounts and privacy settings in SeaMonkey.

Fonctionnalités clés de SeaMonkey

Navigateur web intégré avec interface à onglets
Client de messagerie et de nouvelles intégré
Éditeur HTML simple (Composer)
Client de chat IRC (ChatZilla inclus)
Gestionnaire de mots de passe et contrôles des cookies
Gestionnaire de téléchargements basique
Barres d'outils et thèmes personnalisables

Installer SeaMonkey sous Linux

Fedorasudo dnf install seamonkey

openSUSEsudo zypper install seamonkey

Questions fréquentes

Can I use my existing Firefox extensions in SeaMonkey?

No, most modern Firefox extensions will not work in SeaMonkey. SeaMonkey uses an older extension API, so you must find specific add-ons designed for it.

Does SeaMonkey sync my data across devices?

SeaMonkey does not have a built-in, real-time sync service like Firefox Sync. You would need to manually export and import data or use third-party tools.

Is SeaMonkey suitable for heavy web development?

It is not ideal for heavy development due to potential lag in supporting the latest web standards. Its built-in HTML editor is basic and not a replacement for professional IDEs.