To use these add-ons, you'll need to download Firefox.

Log in

15,327 extensions found in Appearance

Filter results
Search results
  • Simple Start

    Simple Start

    Highly customizable new tab extension with categorized bookmark groups

    datguyducky

    1 user

  • Profanity Filter

    Profanity Filter

    A simple profanity filter for web pages.

    breezdev

    1 user

  • uwu

    uwu

    uwu-owo coworrecteuwur

    pandametal

    1 user

  • UPPERCASE

    UPPERCASE

    All text is transformed to UPPERCASE.

    Katchov

    1 user

  • Large Font Mode

    Large Font Mode

    Instantly enlarge all text.

    thea

    1 user

  • Family Tree Analyzer

    Family Tree Analyzer

    Automatically check and verify family connections in your research.

    Fergus

    1 user

  • FocusBoard

    FocusBoard

    Use a dark background for better visibility and eye comfort.

    Maddison

    1 user

  • Twitch Themer

    Twitch Themer

    Choose what color you want your twitch to be!

    Spiral

    1 user

  • NightShift - ExtensionBuffet

    NightShift - ExtensionBuffet

    Intelligent dark mode for any website. Reduce eye strain with smart theme detection and customizable settings.

    CleanCopify

    1 user

  • Nox — Dark Mode, Light Mode & Contrast Control

    Nox — Dark Mode, Light Mode & Contrast Control

    Smart theme controller for every website. Dark mode, light mode, and everything in between.

    Aucto.ai

    1 user

  • Better Names for 7FA4

    Better Names for 7FA4

    强大的 7FA4 用户名与颜色映射插件

    何乐

    1 user

  • phpBB Forum Color Surpressor

    phpBB Forum Color Surpressor

    A Firefox extension for the phpBB forum to surpress BBCode color and show default color.

    GamingPeon

  • Retro Mode

    Retro Mode

    Retro Mode for Websites

    Max

    1 user

  • Geoguessr Map Street View

    Geoguessr Map Street View

    Shows the Street View Layer on the Geoguessr Map

    cosine

    1 user

  • Double-Click Image Opener

    Double-Click Image Opener

    Double right-click any image to open it in a new tab instantly.

    Enzo

  • NG Music Artwork

    NG Music Artwork

    A simple extension that shows the artwork of Newgrounds songs on their listen page, because why is this not already a thing?

    xeaf

    1 user

  • LMVZ Enhancer

    LMVZ Enhancer

    Removes Server Error 500 from the URL and offers a dark mode for the LMVZ vocabulary trainer.

    RedSystems

    1 user

  • Quick Transl1ator

    Quick Transl1ator

    Translate selected text instantly into Vietnamese using an online translation API.

    luck8style1

    1 user

  • Toggle use_document_fonts

    Toggle use_document_fonts

    Provide a toolbar button to toggle Firefox's browser.display.use_document_fonts setting.

    Crend King

    1 user

  • Google App Classic Icon

    Google App Classic Icon

    Replaces the Google Calendar favicon with the classic icon (before the ugly 2026 one).

    shimi

  • WA Privacy Blur

    WA Privacy Blur

    Blurs WhatsApp Web content for privacy — hover to reveal. Covers chat names, message previews, avatars, header info, profile drawer, and message bubbles.

    Jamal

  • Enlarge ConMasManager Preview

    Enlarge ConMasManager Preview

    放大ConMas Manager預覽報表定義與輸入報表的檢視窗範圍

    ClarK

  • Quick shortcut cards

    Quick shortcut cards

    Changes the new tab page to customizable one.

    Yumi

    1 user

  • GitHub Defreshed

    GitHub Defreshed

    Classical GitHub at its finest

    Kir_Antipov

    1 user

  • Switch between http-S

    Switch between http-S

    A button to quickly manually switch between httpS and http for current tab

    GarryW

    1 user