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How to Fix Repeated FileBrowser Prompts and Slow Microsoft Teams

Rana Garcia Oct 10, 2026 868 views

Question details

The user is encountering recurring FileBrowser prompts and sluggish application performance when using Microsoft Teams.

How to Fix Repeated FileBrowser Prompts and Slow Microsoft Teams

Product: Microsoft Teams
Device & OS: not provided
Scenario: Using Microsoft Teams in a standard browser or the desktop application for daily collaboration.
Observed behavior: Teams runs slowly and displays repeated FileBrowser prompts. These issues disappear entirely when switching to an InPrivate or Incognito browser window.

Before you start

Verify whether the issue persists in an InPrivate or Incognito browser window to determine if corrupted cache data or browser extensions are the root cause.

Solution 1Recommended

Clear Browser Cache and Disable Extensions

Since the issue does not occur in Incognito mode, clearing corrupted cache data and disabling conflicting extensions is the most effective fix.

Incognito mode runs without loading cached files or third-party extensions. If Teams works flawlessly in this mode, a standard browser extension (such as a FileBrowser add-on) or outdated cookies are likely interfering with the application.

Access browser settings

Open your browser's settings menu and navigate to the Privacy and Security section.

Clear browsing data

Select the option to clear browsing data, ensuring that both cookies and cached images/files are checked, then confirm the deletion.

Manage extensions

Navigate to your browser's Extensions menu and temporarily toggle off all active extensions.

Test Microsoft Teams

Restart your browser, launch Microsoft Teams, and enable extensions one by one to identify which specific extension is triggering the FileBrowser prompts.

Clear Browser Cache and Disable Extensions

Identify Conflicting Add-ons: Check specifically if you have an extension named 'FileBrowser' installed, as disabling it may immediately resolve the prompts.

Solution 2

Clear the Microsoft Teams Desktop App Cache

If you are experiencing the issue within the Windows Teams desktop application, clearing the local app cache can resolve recurring prompts and slow performance.

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Frequently Asked Questions

Why does Microsoft Teams work normally in Incognito mode?

Incognito or InPrivate mode runs a clean session without loading your installed browser extensions, stored cookies, or cached data. If Teams works well in this mode, it confirms that the issue is caused by your standard browser's cache or a conflicting extension.

Will clearing the Microsoft Teams cache delete my messages or files?

No. Clearing the Teams cache only removes temporary files stored locally on your computer to help the app load faster. Your chat history, channel conversations, and files are securely stored on Microsoft's servers and will sync back immediately once you log in.

What is the FileBrowser prompt in my browser?

FileBrowser could be a specific browser extension you have installed or a third-party add-on that is conflicting with the Teams web application. Reviewing your browser's extension list and disabling unrecognized add-ons can stop the prompt from appearing.

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