Mozilla Firefox, alternative Linux à Opera

Mis à jour le 18 octobre 2026

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Mozilla Firefox is a strong, stable replacement for Opera if you can live without the built-in VPN. It handles fast page loading, offers a highly customizable interface, and supports the same extension ecosystem. However, it lacks Opera's integrated ad blocker and privacy tools out of the box. You will need to install add-ons like uBlock Origin to match Opera's default privacy stance. If the built-in VPN is your primary reason for using Opera, Firefox is not a direct drop-in replacement. For users who prioritize open-source transparency and don't mind configuring their own privacy stack, Firefox is an excellent choice.

Couverture fonctionnelle85%

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

Installer Mozilla Firefox

Ce qui fonctionne pareil

Supports a vast ecosystem of extensions and add-ons
Allows deep UI customization, including themes and layout changes
Receives regular security updates and patches
Provides fast page loading performance
Supports multiple profiles for separate browsing sessions

Ce qui change

Lacks a built-in VPN; requires third-party services or add-ons
No built-in ad blocker; must install extensions like uBlock Origin
Open-source model (MPL-2.0) versus Opera's proprietary codebase
Does not include Opera's built-in crypto wallet or news aggregator
Different default search engine and privacy tracking protection implementation

Ouvrir vos fichiers Opera

Firefox can import bookmarks, passwords, and history directly from Opera during initial setup if Opera is installed on the same machine. If migrating from a Windows machine to Linux, you must export bookmarks from Opera to an HTML file and import that file into Firefox. Opera-specific profile data or internal settings do not transfer. Passwords can be exported from Opera to a CSV file and imported into Firefox, though you should handle this file securely as it contains sensitive credentials.

Passer de Opera à Mozilla Firefox, étape par étape

Export bookmarks from Opera to an HTML file
Export passwords from Opera to a CSV file
Install Mozilla Firefox on your Linux system
Import the HTML bookmarks file into Firefox
Import the CSV password file into Firefox
Install essential extensions like uBlock Origin to replace built-in ad blocking

Fonctionnalités clés de Mozilla Firefox

Écosystème d'extensions étendu
Protection intégrée contre le suivi
Interface utilisateur personnalisable via CSS
Mises à jour de sécurité régulières
Prise en charge de profils multiples
Liste de lecture Pocket intégrée

Questions fréquentes

Does Firefox have a built-in VPN like Opera?

No, Firefox does not include a built-in VPN. You will need to use a third-party VPN service or install a VPN add-on if available, but it is not integrated into the browser core.

Can I customize Firefox to look like Opera?

Yes, Firefox supports extensive customization via CSS and themes. You can change colors, fonts, and layout to closely resemble Opera's interface, though some specific Opera widgets may not have direct equivalents.

Is Firefox's ad blocking as good as Opera's built-in feature?

Firefox has built-in tracking protection, but it is less aggressive than Opera's ad blocker. To match or exceed Opera's performance, you should install the uBlock Origin extension, which is widely considered the standard for ad blocking.