SeaMonkey, alternative Linux à Opera

Mis à jour le 18 octobre 2026

Notre avis

SeaMonkey is not a good replacement for Opera if you rely on a modern, fast browser with built-in VPN and ad blocking. It shares Opera's customizable UI and extension support to some degree, but lacks both performance and critical privacy tools. SeaMonkey's browser component is functional but outdated, with slower page rendering and limited security updates. It may suit users who value integrated email and HTML editing over speed and privacy, but most Opera users will find it lacking. Only consider it if you need a legacy-style internet suite and can live without modern protections.

Couverture fonctionnelle40%

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

Installer SeaMonkey

Ce qui fonctionne pareil

Both offer customizable toolbars and themes
Support tabbed browsing
Include built-in email clients
Allow extension installation
Provide password and cookie management

Ce qui change

SeaMonkey lacks a built-in ad blocker and VPN
No regular security updates at the level of Opera
Slower page loading due to older rendering engine
Includes IRC chat and HTML editor not in Opera
Opera has a more modern, performance-focused browser

Ouvrir vos fichiers Opera

SeaMonkey does not directly open Opera session files or bookmarks in a proprietary format. If Opera exports bookmarks to HTML, SeaMonkey can import them via its import tool. Passwords and settings cannot be directly migrated. Email data from Opera Mail would need manual export to mbox or similar and imported into SeaMonkey's Mail & Newsgroups component. File compatibility is limited and requires manual conversion.

Passer de Opera à SeaMonkey, étape par étape

Export Opera bookmarks as HTML
Import bookmarks into SeaMonkey via Tools > Import
Manually reconfigure email accounts in SeaMonkey Mail
Install needed extensions from SeaMonkey add-ons page
Copy saved passwords manually, if required
Adjust toolbar layout under Customize

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

Does SeaMonkey have a built-in ad blocker like Opera?

No, SeaMonkey does not include a built-in ad blocker. You must install an extension like Adblock Plus separately, and even then, filtering is less integrated and effective than in Opera.

Can I use SeaMonkey extensions in Opera or vice versa?

No. SeaMonkey uses legacy XUL extensions, which are incompatible with Opera's Chromium-based extension system. Neither browser can run the other's add-ons.

Is SeaMonkey secure enough for daily browsing?

It's usable but not ideal. Updates are infrequent, and the browser lacks modern sandboxing and real-time threat protection. It's less secure than Opera, especially on untrusted sites.