Browser extensions starting with S

Stock Performer Extension lets Stock Performer pages make credentialed requests to caller-provided URLs.

Stocksi Ultimate sends scoped error telemetry with page URLs and device/network details to websocket.priority.news.

StorySaver sends clicked Instagram post, story, reel, audio, or profile URLs to storysaver.to.

StoryVerse Stories Hub for FB and IG reads Facebook and Instagram cookies and request tokens to load stories.

Strava GPX downloader fetches Strava activity metadata and fitness streams when the user clicks its GPX button.

Strava Heatmap attaches your Strava cookies to global heatmap tile requests and makes the responses readable by other sites.

Straw Hat Live Wallpaper sends each saved shortcut URL to Google's favicon service when opening a new tab.

StreamFab Video Downloader sends cookies from the active non-YouTube site to its native companion app.

StreamPod exposes Twitter OAuth callback pages that exchange supplied codes and send Twitter tokens to StreamHQ services.

StreamSpeed can disable Russian-language pages and play looping remote audio after its toolbar button is clicked.

StreamSync sends Twitch VOD identifiers from Twitch playback pages to streamsync.fr to fetch music timelines.

Streamer tools for Gartic Phone sends player names and host details to an AWS API when its Custom OC Game button is used.

Streamfinity Buddy sends YouTube playback URLs and timestamps to Streamfinity while a logged-in user has a live stream.

StreetPass for Mastodon records rel=me profile links and page URLs for Mastodon matching.

StudyPal AI sends submitted questions to OpenAI using a bearer API key bundled in the popup.

StudyX uploads user-selected page screenshots and source URLs to StudyX servers for homework answers.

Substly Extension sends matched page-view URLs and user/account identifiers to app.substly.com.

Subtitle Masker injects an on-page overlay whose element IDs include the extension runtime ID.

Success.ai - Email Finder sends the active site's domain or LinkedIn page URL to Success.ai lead-search APIs.

SuitePrint sends SuiteFiles usernames and passwords in the login request URL.

SummarizeYT sends YouTube transcripts, video titles, and a persistent IP-based browser identifier to its summary API.

Suno Explorer submits aggregate Suno library metrics to a Supabase endpoint after indexing and on a daily alarm.

Super Cloner can replay source funnel metadata from any HTTP(S) page into GoHighLevel clone APIs.

Super Focus Tabs captures active-tab screenshots on all URLs and stores them locally for tab previews.

Super GSC sends signed-in email addresses and Search Console keyword queries to api.supergsc.com.

Super Kulasis sends Kyoto University course and professor names from KULASIS pages to tatekan.copynight.net.

Super Megavendas sends user-selected WhatsApp chat transcripts to Google Gemini for AI conversation analysis.

Super PDF Split Merge lets any embedding website trigger downloads through its web-accessible option page.

SuperDrag turns page drag gestures into browser tab opens for links, images, and selected text.

SuperHelper rewrites Superbuy and AllChinaBuy crawler risk responses to lower product warning levels.

SvcHost Downloader stores your SvcHost session token and user profile for authenticated downloader API requests.

SwapChat sends social and NFT profile identifiers to chat.web3messaging.online when users open its chat widgets.

swiftify sends your browser geolocation coordinates to OpenWeather when its new-tab weather widget loads.

Swipe Offers Spy exposes stored account details and authenticated transcription requests to Facebook Ads Library page scripts.

System Info opens a Chrome Web Store promotion tab for another extension after updates.

screenshot-to-pdf injects a Cloudinary image into the active page after each screenshot capture.

shikimori-ext sends selected Shikimori title IDs to anime.bytie.moe for video lookup.

sip lets any HTTPS page read its wallet settings through a hardcoded bridge namespace.

ssstik - Tik Tok Downloader submits selected TikTok video URLs to ssstik.net for download processing.

streamSync TTV Hi-Res enables a StreamSync-controlled proxy for Twitch video and API requests.

studyfoc.us lets any website enable time-spent tracking and forward visited hostnames to StudyFoc.us pages.

svg converter copies SVG markup from the active HTTPS tab into extension local storage when its side panel opens.

Scalelist reads your LinkedIn session cookies and captured request headers and sends them to its own servers to act on your account.

Star Match Game sends popup page-view telemetry with a persistent client ID to Google Analytics.

SiteMacro stores user-recorded form field values in browser extension storage for later replay.

Stanford GSB Library Chrome Extension sends a persistent extension user ID and popup activity to Google Analytics.

Scheduled Analytics reads your LinkedIn 'li_at' session cookie and sends it to app.scheduled.so, where it is stored to act on your account.

Sidebar for YouTube removes YouTube frame-blocking headers from subframe responses across browsing contexts.

Saving Button accepts a page cookie as its login token and sends it to api.inspiri.ng for account and offer requests.

Sapling's writing assistant loads and runs unsigned code from its own server on Amazon Connect contact-center pages.

Simple Video Downloader sends the video URL you enter to a third-party site instead of downloading it in the extension.

SavvyConnect streams every page you visit, plus raw request/response headers including cookies, to Luth Research.

SafeTuber sends YouTube video IDs/captions and viewing telemetry to its AWS and Supabase backends.

SNS Assistant | Instagram Threads overrides confirm, prompt, and alert dialogs on every blog.naver.com page it loads on.

Smarty's opt-in Amazon Price Protection feature opens a hidden tab to scrape your Amazon order history and sends it to Smarty's servers.

Savelore accepts dashboard-supplied sync tokens and uses them to upload saved snippets to Supabase.

SmartPrice Guard rewrites every Amazon product URL and link with its own affiliate tag from a remote server, undisclosed.

Skip Wait lets pages trigger credentialed extension fetches to page-chosen URLs.

SL Sender bundles an affiliate SDK that watches every site you visit and opens background tabs to inject affiliate cookies when shopping.