Understanding Page Access Permissions
When an extension asks to 'read and change all your data on the websites you visit', it is requesting broad access. This means the extension can see everything displayed on any webpage you open. It can also see information you type into forms or click on.
This permission is often necessary for extensions that modify page content or extract information. Think of tools that highlight text, translate pages, or save articles. They need to 'see' the page to work. Without this, they could not perform their core functions.
The Difference Between Reading and Sending Data
An extension reading your tab content is not the same as it sending that content somewhere else. 'Reading' means the extension can access the data locally within your browser. This data might only be used to change what you see on the screen.
However, an extension can also be programmed to 'send' this data. It might send it to a remote server. This could be for analysis, storage, or sharing. The key is that the extension has the *capability* to do both if it has page access. You need to verify if it *actually* does.
Questions to Ask Before Installing
Always review an extension's privacy policy. Look for clear statements about what data is collected and how it is used. Be wary if this information is vague or missing. Also check developer reputation.
Consider if the extension's requested permissions align with its stated purpose. A simple calculator extension should not need access to all your web content. If the permissions seem excessive, investigate further or choose an alternative.
How to Verify Where Data Goes
You can use your browser's developer tools to monitor network activity. Open the 'Network' tab in the developer tools (usually F12 or right-click 'Inspect Element'). Then activate the extension's function. See if any data is sent to external servers.
This is an advanced step. For simpler checks, rely on the extension's transparency. Trusted extensions often state clearly if data leaves your browser. LocalBridge, for example, sends tab content to your chosen AI service, as that's its purpose. It does not store your content itself.