Claude Counter
Real-time token counter, cache timer, and full-precision usage bars for claude.ai — right in the composer. Know your limits before you hit them.
450 users
ScrapeMate Beta
Scraping assistant tool. Editing and maintaining lists of CSS/XPath selectors across webpages. Element picker (from SelectorGadget). Presets manager. Active preset JSON view/edit. JavaScript toggling per tab.
447 users
Sourcegraph for Firefox
Adds code intelligence to GitHub, GitLab, Bitbucket Server, and Phabricator: hovers, definitions, references. Supports 20+ languages.
446 users
All-In-One PageSpeed Test
Test any website performance with main test tools with one single click: Google PageTest Insights, GTmetrix, Yellow Lab Tools
442 users
Sif — 亚马逊Listing和广告优化
Sif对亚马逊站内流量实现无死角全覆盖，精准查询每个产品的自然搜索、PPC广告、Deal(活动)、搜索推荐和关联流量，并锁定每个产品的主要流量词和精准长尾词，帮助卖家洞察不同竞品、不同变体的流量来源，据此优化自己的Listing和调整竞争策略
438 users
Wide GitHub
Makes GitHub wide on Mozilla Firefox. Supports GitHub, private Gists, GitHub Enterprise, and custom domains (TLDs).
438 users
PeerName: Surf Blockchain-Based Domains
Enables the resolving of Dot-BIT domains by Namecoin. Also .emc, .coin, .lib and .bazar domains by EmerCoin.
437 users
Cookies and HTTP Headers analyser
This extension analyses, according to OWASP guidelines, the cookies and the headers in the active tab.
429 users
Show Server IP
Show the Server IP without interacting with external Sites. If you are behind a proxy it will only show the IP of the Proxy!
429 users
W3Techs Website Technology Information
Shows which web technologies the current site is using.
427 users
Canvas Blocker - Fingerprint Protect
Prevent HTML canvas element from generating a unique identification key to protect user's privacy
425 users
ClickJacking
ClickJacking is a tool developed by Pentester Helper to help website owners determine if their website is vulnerable to clickjacking.
423 users
LLMFeeder - Web to Markdown for AI
Convert web pages to clean Markdown for ChatGPT, Claude and AI. Multi-tab support, right-click menus, token counter. 100% offline.
421 users
Inspector DOM Sidebar
Adds a new sidebar to the developer tools inspector panel, that shows the properties of the selected element.
421 users
Tota11y: Accessibility toolkit
Inserts the tota11y JS file from Khan Academy into the current tab so that you can visualize how the current page performs with assistive technologies. All the credit goes to Khan Academy for their amazing script.
419 users
Onion Control (anonymous proxy)
Brings the anonymity of the Tor network and modifies few settings to protect user privacy
414 users
Easy XSS
XSS made Easy. Easy XSS makes it possible for you to text XSS with just 2 mouse clicks.
413 users
Majestic Backlink Analyzer
Majestic Backlink Analyzer gives instant insight into the number of backlinks and domains linking to the URL and domain you are currently browsing. Majestic users can drill down to see the links, topics and add them to their Majestic bucket list.
411 users
