The Danger of “Snooping” AI Browser Extensions: Vetting Grammarly, Read.ai, and PDF Tools
Article summary: AI browser extensions like Grammarly, Read.ai, and various PDF tools read and process everything visible in the active browser tab, often sending that content to external servers for cloud-based analysis. Most employees install them without IT approval and forget they exist. Vetting these tools before deployment and auditing which ones have active access to company accounts closes an overlooked data exposure gap.
A writing assistant that fixes grammar. A meeting tool that generates notes. A PDF extension that summarizes documents in seconds.
Individually, these tools seem harmless. Collectively, they create a new visibility problem for businesses.
AI browser extensions work by accessing the content users view and interact with in their browsers. In many cases, that means emails, documents, customer records, internal systems, and other business data.
The question is not whether these tools are useful. The question is whether the organization knows which ones are installed, what information they can access, and how that data is being handled.
As more work moves into the browser, answering those questions becomes a core part of security oversight.
What These Extensions Actually Do
Grammarly is a useful example.
To provide writing suggestions, Grammarly needs access to the text users enter into websites and web applications. That content is processed through cloud-based systems, which is what enables the service to generate corrections, recommendations, and rewrites.
This is not a security flaw. It is the mechanism that makes the product useful.
The implication for businesses is that when an employee uses Grammarly while drafting a client email, preparing a contract, or entering information into a CRM, that content may be processed outside the organization’s environment.
Read.ai works differently but with a broader scope.
It captures meeting audio, video, and screen content for transcription and analysis. A single meeting involving client names, financial details, or internal strategy becomes a record in a third-party system.
PDF browser tools frequently request permissions that extend far beyond the document being opened. Many ask for access to all pages in the active tab, all browser activity, or the ability to inject code into pages. The permission they request is often broader than the task they perform.
The Permission Problem
According to Incogni’s 2025 analysis of 238 AI-powered Chrome extensions, 67% collected user data and 41% collected personally identifiable information. Depending on the extension, the data collected could include authentication credentials, financial information, and location data.
Help Net Security coverage of the Incogni research ranked Grammarly and QuillBot among the most potentially privacy-damaging popular Chrome extensions. Both collected website content and personal communications, and Grammarly also collected user activity data, including interaction patterns and navigation activity.
The two permissions that carry the most risk are activeTab, which grants temporary access to the current tab, and scripting, which allows code injection into web pages. Together they give an extension significant reach into what users see and do.
The Real Problem
According to enterprise software analysis firm Xensam, Grammarly is the most widely installed browser extension in corporate environments, often deployed without formal IT approval, visibility, or governance.
According to Xensam’s enterprise analysis, most organizations have no visibility into which extensions are running on employee browsers.
This mirrors the dynamic our post on ghost accounts and forgotten app access describes: access that was granted informally and never reviewed creates exposure. Extensions installed without approval today can still be running two years from now.
How to Vet an AI Extension Before Deploying It
Check the permissions requested
Before installing any extension, open the Chrome Web Store listing and read the permissions section. Ask whether the permissions match the stated function. A PDF reader requesting access to all tabs does not need that access to open a file.
Review the privacy policy for data processing and retention
Look specifically for three things: where data is sent, how long it is retained, and whether it is shared with third parties. Legitimate tools publish this clearly. Vague or absent answers are a signal to dig deeper before deploying.
Require enterprise versions with a Data Processing Agreement
Consumer versions of these tools are designed for individual use and may not meet business data handling standards.
Enterprise tiers typically include a Data Processing Agreement (DPA) that specifies how business data is handled, which matters for compliance and accountability.
Manage extensions centrally
Google Chrome and Microsoft Edge both support managed browser policies that restrict which extensions can be installed. Locking this down through a proactive security posture prevents unreviewed tools from reaching business accounts in the first place.
Visibility Starts With a List
Start by finding out what is already active. Ask employees to share their browser extension list or pull it centrally via a managed browser policy. You may find tools nobody remembers installing.
Unbound Digital helps small businesses audit browser extension exposure, tighten permission controls, and put policies in place that keep AI tools from becoming a data liability. Call us at 423-467-7777 or contact us online to get started.
Article FAQs
Is Grammarly actually dangerous to use at work?
Grammarly is not considered malicious software. The risk comes from how it works. To provide writing suggestions, the service processes content outside the organization’s environment. When employees use it without IT approval or appropriate data governance controls, sensitive business information may be handled in ways the organization has not reviewed. Enterprise tiers offer additional controls that help address these concerns.
What permissions should I be worried about in a browser extension?
The two most significant are activeTab, which grants access to the current browser tab, and scripting, which allows code to be injected into pages. Extensions requesting access to all sites on all tabs, or persistent background access, deserve extra scrutiny before installation.
How do I find out which extensions my team is using?
Ask employees to open their browser extension manager and share the list. For more systematic coverage, managed browser policies through Google Workspace or Microsoft Intune let IT see and control extension installations across all company devices.
Do these concerns apply to desktop apps too, or only browser extensions?
Both. Desktop versions of tools like Grammarly work similarly to their browser counterparts, processing text through cloud servers. Meeting tools like Read.ai capture data regardless of whether they run as a browser extension or a desktop application. The vetting process is the same.