Browser extensions starting with J

JOSEPHA sends the current page URL and location/account metadata to Firebase and PostHog during price searches.

Opens Strava Global Heatmap imagery in JOSM with the needed URL and cookie header values.

This extension converts text in the active browser tab into editable text using OCR.

Convert JPEG, PNG, and WebP images in the browser with quality and resize options.

This extension provides a cookie editor for web developers and includes a Snake game.

Scans page JavaScript for known vulnerable libraries and can track, block, or patch detected scripts.

Formats JSON to make it easier to read.

JSON Compare sends user-entered HTTP(S) JSON URLs to jsondiff.com before comparing them.

JSON Crack Formatter sends the current page's raw JSON body to a jsoncrack.com widget when you click its button.

This extension formats JSON from the right-click menu with a readable, foldable view.

JSON Hero sends page JSON and supported metadata from the current tab to jsonhero.io.

JSON Tools sends popup page views, button clicks, and persistent client/session IDs to Google Analytics.

Formats, validates, edits, and displays JSON files in a readable browser interface.

Converts pasted JSON text into a downloadable CSV file.

JSONGrid Web Inspector sends usage events with a persistent client identifier to Google Analytics.

JUAN marks crypto cashtags on X pages and exposes matching saved portfolio details in page DOM tooltips.

JW Web Add-on imports Google Fonts in its popup, sending a font request to Google when the control panel opens.

JWT Decoder stores user-entered JWTs in Chrome sync storage after decoding them.

This extension provides notifications about new activity from Jadisco.pl.

Japanese Spring Live Wallpaper sends user-added shortcut URLs to Google to load favicon images.

This extension replaces the Chrome new tab page with a Wuthering Waves live wallpaper and productivity widgets.

Jinu - KPop Demon Hunters Live Wallpaper sends each new-tab shortcut URL to Google's favicon service.

This extension shows real-time JioHotstar pixel tracking events for verification and troubleshooting.

Adds Jira controls for copying an issue title, key, and URL to the clipboard.

Jisho-OJAD sends words from Jisho pages to OJAD to fetch pitch-accent annotations.

Counts words and characters in selected text from the right-click menu.

Jiten Reader sends Japanese text from pages you parse to api.jiten.moe for dictionary tokenization.

Replaces the new tab page with rotating JoJo's Bizarre Adventure wallpapers and quick-access widgets.

Job Scraper for LinkedIn sends LinkedIn job-search page URLs to Mixpanel when users use scraper controls.

Adds LinkedIn job search filters to hide promoted, viewed, or applied jobs and show early-applicant listings.

JobFillr shows a success message that loads a Buy Me A Coffee image from cdn.buymeacoffee.com.

JobGlance sends visited job-posting details and a persistent extension UUID to its Supabase backend.

This extension replaces the new tab page with a Dio Brando live wallpaper and built-in shortcuts.

Jokes and Smiles - New Tab sends new-tab telemetry to Google Analytics and requests country data from ipapi.co.

This extension adds a Jon Snow and wolf live wallpaper with time, search, shortcuts, and cursor customization.

Jotit stores user-entered two-factor authentication secrets in Chrome sync storage without encryption.

JoyaGoo Warn Reminder Remover rewrites product-page referral parameters on scoped shopping sites.

Jstris+ sends Jstris chat names, screenshots, and replay data to Jeague or fumen services when related features run.

This extension adds fan-made Jujutsu Kaisen custom cursors to Chrome.

This extension replaces new tabs with rotating Jujutsu Kaisen wallpapers and a built-in search bar.

Replaces the new tab page with rotating Jujutsu Kaisen HD wallpapers and quick-access tools.

This extension lets users view and play JumboMail files without downloading them.

This extension lets you play the Jump Ball arcade game in Chrome, including offline.

Hides bookmark titles so the bookmarks bar shows icons only.

Displays an animated Monika screensaver with DDLC-style dialogue when the machine is idle.

Just The Instructions sends page text and a stored user ID to its AI extraction service when you press the GPT button.

JustSnipe eBay Auction Sniper sends the active tab URL to m.justsnipe.com whenever its toolbar popup opens.

Adds an interactive play-along game board to Jeopardy! archive pages on J-Archive.

Formats JSON text and lets users browse JSON documents as a node tree.

JWT Debugger imports JWT-looking cookies and Web Storage values from the active tab into its popup debugger.

Join Cherry reads hotel, flight, and activity search details from booking sites and sends them to its server to find a cheaper price.

Capture for monday.com and Jira sends Jira site name and usage events to the vendor's logging and license servers.

JS/CSS/HTML Beautify reformats raw-text pages and embeds a third-party ad iframe from djallalzoldik.github.io.

JetStream VPN routes browser traffic through vendor proxy servers and sends its proxy login to any site that asks.

Just Invite sends your Facebook profile details and managed page and group lists to its own backend.

JSON Formatter loads HTML banners and links from linangdata.com into its popup each time it opens.

jp343 Track Your Japanese Immersion syncs watched and read page details to jp343.com when account sync is active.

Jadu Assist sends selected CMS field content and page link URLs to Jadu's n8n webhook when its AI features are used.

Journey ArtPrompt with Midjourney lets a remote server silently replace the new-tab search engine used for every typed query.

Jobright Fraud Detection reads candidate PII from ATS pages and sends it to Jobright's servers for a fraud score.