Is HeaderFlex - Modify HTTP Requests safe to install?

What data it declares

The developer declares that it collects these kinds of data:

• Authentication information such as passwords, credentials or PIN codes
• Web history the list of pages you visit
• Website content such as text, images or links on the pages you open

The developer also certifies that your data is not sold to third parties outside approved uses, not used for purposes unrelated to the extension's core function, and not used to decide creditworthiness or lending.

The listing links to a privacy policy.

This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

What Chrome asks you to allow

When you add it, Chrome asks you to allow it to:

• Read and change all your data on all websites
• Block content on any page
• Read data you copy and paste
• Manage your downloads
• Capture content of your screen

Derived from the manifest by Chrome's documented rules; the dialog's exact wording depends on your Chrome version and language. Chrome asks again if an update requests more.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

Reaches your browsing data or every site

• Read what you have copied clipboardRead
• Attach to pages the way developer tools do debugger
• Capture the contents of your screen desktopCapture
• Capture the contents of a tab tabCapture

Worth knowing

• Block or redirect requests by rules it declares in advance declarativeNetRequest
• Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
• Manage your downloads downloads

Routine for an extension

• Run work in a hidden page offscreen
• Open a panel beside the page sidePanel
• Store data in your browser storage

How usual this is for its category

In Productivity · Developer, 31% of extensions ask for access to every site. This one: Access to every site.

The typical extension there declares 3 browser permissions; this one declares 10 browser permissions.

• Read what you have copied (clipboardRead): 1% of extensions in this category ask for it.
• Attach to pages the way developer tools do (debugger): 4% of extensions in this category ask for it.
• Capture the contents of your screen (desktopCapture): under 1% of extensions in this category ask for it.
• Capture the contents of a tab (tabCapture): 1% of extensions in this category ask for it.

Counted over the live extensions of the same category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Who uses it and how it is kept up

38 users

• Last updated in the store 26 days ago, on 2026-09-14.
• We have seen 1 new version in the last 90 days.

What the store shows

• Established publisher The store's badge for publishers with a good record and no history of violations.

Has it asked for more over time?

This is the question a permission list on its own cannot answer. An extension that shipped narrow and widened later is a different proposition from one that always asked for the same thing.

The permissions this extension requests have not changed since we started watching it.

Versions we have seen

1. 2026-09-14Version 1.0.11

Who publishes it

knothhe, who publishes 3 listings we track. This listing has been in the store since 2026-07-16 and was last updated on 2026-09-14.

Similar extensions that ask for less

Listings close to this one in what they say they do, which declare less reach. Less reach is not a verdict on either: compare what each needs for the job.

1. HeaderPilot No site access · 3 permissions 4 users ★ 5.0
2. HeaderMod No site access · 4 permissions 46 users
3. HeaderCraft Pro: Fast & Private MV3 Request Access to specific sites only · 2 permissions, 1 site pattern 3 users (last published figure)

How to check or remove it in Chrome

1. Type chrome://extensions in the address bar and find the extension in the list.
2. Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
3. To uninstall it, choose Remove on the same page.

Questions people ask

What can HeaderFlex - Modify HTTP Requests access?

Every site you visit. This extension can read and change the content of any page you open. It declares 10 browser permissions.

What data does HeaderFlex - Modify HTTP Requests collect?

The developer declares that it collects these kinds of data: Authentication information, Web history, Website content. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has HeaderFlex - Modify HTTP Requests asked for more permissions over time?

The permissions this extension requests have not changed since we started watching it.

Does HeaderFlex - Modify HTTP Requests publish a privacy policy?

Yes, the store listing links to a privacy policy.