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<!DOCTYPE html> <html lang="en-US" dir="ltr"><head><title data-react-helmet="true">Add-ons for Firefox (en-US)</title><meta charSet="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link href="/static-frontend/Inter-roman-subset-en_de_fr_ru_es_pt_pl_it.var.2ce5ad921c3602b1e5370b3c86033681.woff2" crossorigin="anonymous" rel="preload" as="font" type="font/woff2"/><link href="/static-frontend/amo-14a6d2cafa602d18eac1.css" integrity="sha512-H/D5bZgithMjrIdaQn7+FRaiI/3BVfz2U0e5BzoSay84Be8FhUvLqsrrsW9DXHNN+bt4NoEmtwqPD2fHF1GUXw==" crossorigin="anonymous" rel="stylesheet" type="text/css"/><link rel="shortcut icon" href="/favicon.ico?v=3"/><link data-react-helmet="true" title="Firefox Add-ons" rel="search" type="application/opensearchdescription+xml" href="/en-US/firefox/opensearch.xml"/></head><body><div id="react-view"><div class="Page-amo"><header class="Header"><div class="Header-wrapper"><div class="Header-content"><a class="Header-title" href="/en-US/firefox/"><span class="visually-hidden">Firefox Browser Add-ons</span></a></div><ul class="SectionLinks Header-SectionLinks"><li><a class="SectionLinks-link SectionLinks-link-extension" href="/en-US/firefox/extensions/">Extensions</a></li><li><a class="SectionLinks-link SectionLinks-link-theme" href="/en-US/firefox/themes/">Themes</a></li><li><div class="DropdownMenu SectionLinks-link SectionLinks-dropdown"><button class="DropdownMenu-button" title="More…" type="button" aria-haspopup="true"><span class="DropdownMenu-button-text">More…</span><span class="Icon Icon-inverted-caret"></span></button><ul class="DropdownMenu-items" aria-hidden="true" aria-label="submenu"><li class="DropdownMenuItem DropdownMenuItem-section SectionLinks-subheader">for Firefox</li><li class="DropdownMenuItem DropdownMenuItem-link"><a class="SectionLinks-dropdownlink" href="/en-US/firefox/language-tools/">Dictionaries & Language Packs</a></li><li class="DropdownMenuItem DropdownMenuItem-section 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class="AutoSearchInput-query" id="AutoSearchInput-q" maxLength="100" minLength="2" name="q" placeholder="Find add-ons" value=""/><div id="react-autowhatever-1" role="listbox"></div></div><button class="AutoSearchInput-submit-button" type="submit"><span class="visually-hidden">Search</span><span class="Icon Icon-arrow"></span></button></div></div></form></div></header><div class="Page-content"><div class="Page Page-not-homepage"><div class="AppBanner"></div><div class="Addon Addon-extension"><ul class="ErrorList"><li class="ErrorList-item"><div class="Notice Notice-error"><div class="Notice-icon"></div><div class="Notice-column"><div class="Notice-content"><p class="Notice-text">Invalid "appversion" parameter.</p></div></div></div></li></ul><div class="Addon-header-wrapper"><section class="Card Addon-header-info-card Card--photon Card--no-header Card--no-footer"><div class="Card-contents"><header class="Addon-header"><div class="Addon-icon"><div class="Addon-icon-wrapper"><img class="Addon-icon-image" src="/static-frontend/1b2fb62f37f1c1e59208f4993714d166.svg"/></div></div><h1 class="AddonTitle"><span class="LoadingText LoadingText--delay-2 LoadingText--width-80" role="alert" aria-busy="true"></span></h1><div class="Addon-summary-and-install-button-wrapper"><p class="Addon-summary"><span class="LoadingText LoadingText--delay-2 LoadingText--width-100" role="alert" aria-busy="true"></span></p></div><h2 class="visually-hidden">Extension Metadata</h2></header></div></section><section class="Card Addon-header-meta-and-ratings Card--photon Card--no-header Card--no-footer"><div class="Card-contents"><div class="AddonMeta"><h3 class="visually-hidden">Used by</h3><div class="MetadataCard AddonMeta-overallRating"><dl class="MetadataCard-list"><dd class="MetadataCard-content"><span class="LoadingText LoadingText--delay-1 LoadingText--width-20" role="alert" aria-busy="true"></span></dd><dt class="MetadataCard-title">Users</dt></dl><dl class="MetadataCard-list"><dd class="MetadataCard-content"><span class="LoadingText LoadingText--delay-1 LoadingText--width-20" role="alert" aria-busy="true"></span></dd><dt class="MetadataCard-title">Reviews</dt></dl><dl class="MetadataCard-list"><dd class="MetadataCard-content"><div class="AddonMeta-rating-content"><div class="Rating Rating--small Rating--loading Rating--yellowStars" title="There are no ratings yet" role="alert" aria-busy="true"><div class="Rating-star Rating-rating-1" title="There are no ratings yet"></div><div class="Rating-star Rating-rating-2" title="There are no ratings yet"></div><div class="Rating-star Rating-rating-3" title="There are no ratings yet"></div><div class="Rating-star Rating-rating-4" title="There are no ratings yet"></div><div class="Rating-star Rating-rating-5" title="There are no ratings yet"></div><span class="visually-hidden">There are no ratings yet</span></div></div></dd><dt class="MetadataCard-title"><div class="AddonMeta-rating-title">Not rated 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