ModHeader - Modify HTTP headers
Developer Tools
FreemiumConfidence 64
Modify HTTP request headers, response headers, and redirect URLs
Users
900K
Rating
2.9
Reviews
1,228
7D Growth
0|0%
Stable signalUnknownHigh-risk permissions
Modify Header Value (HTTP Headers)
Add, modify or remove a header for any request on desired domains.
Users40KCurrent public install base
Rating3.3Store average score
Reviews54Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
4 assetsModify Header Value (HTTP Headers) Media preview
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7-day rating change
Start
3.34
Latest
3.30
7-day rating change
-0.04
2026年7月15日2026年7月21日
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1-day growthNo data
----7-day growthFlat
00%30-day growthNo data
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Version0.2.0
ManifestV3
Size95.87KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
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Modify Header Value (HTTP Headers) is an extension that can add, modify or remove an HTTP-request-header for all requests on a desired website or URL. This Addon is very useful if you are an App developer, website designer, or if you want to test a particular header for a request on a website.
Key features:
1. Easily add, modify or remove a header for any request on desired domains.
2. For a complete list of HTTP headers, please take a look at the list of all HTTP Header Fields on the Wikipedia page (https://en.wikipedia.org/wiki/List_of_HTTP_header_fields).
3. Clicking on the Toolbar icon opens a UI to quickly switch the Addon ON or OFF, or open the options page.
4. Each header item has several options to adjust (see add-on's Options page for details)
Reviews
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Store average score3.3Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.4Average computed only from synced review bodies below
Reviews with text43Synced review bodies
Total ratings / reviews54Chrome Web Store public rating/review count
Store average score: 3.3. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Useful specific domain selection
Ne fonctionne simplement pas totalement incapable de modifier un header de réponse
Doesn't work sometimes. At random intervals, this extension stops doing the one thing it's designed to do: inject headers in browser requests. There is really no consistency to this, I had to simply disable the extension and use another. Since this one has URL filtering(and the other one doesn't) I'm still leaving this as installed. Otherwise, there's no real reason for me to keep this. Consistency is vital.
Not a very friendly UI yeah but it really does work, nice job!
I just love it.
This extension does appear to work as advertised but there's a lot of room for improvement in the GUI and instructions. For example, the instructions explain what each column does by assigning them a number and saying, "Column 1 does this, Column 2 does that," etc, but the columns in the actual GUI aren't numbered. They are NAMED. So when you read "Column 9 does so and so," you can't just look down and find "Column 9" because there is no such label. You have to sit there and count the columns up to 9 to see which one they are referencing. Another problem (which could be user error) is that the 'Sub' checkbox doesn't appear to work properly. The instructions state that if 'Sub' is NOT checked, "the header will be applied to the exact URL(s) matching the given URL." However, I have yet to find a configuration in which checking the 'Sub' box activates the rule. The rules only work when 'Sub' is unchecked. According to the instructions, if I leave it unchecked, the changes should only apply to the EXACT URL entered. To reproduce the problem, create a rule with the following values: URL: https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending Domain: <checked or unchecked> (value doesn't appear to matter) Sub: <checked> Header Name: User-Agent Add: <checked> Modify: <unchecked> Remove: <unchecked> Header Value: Test 123 State: ACTIVE Now browse to the URL listed in the rule and view the displayed "USER-AGENT" header value. Note that the User-Agent does NOT display "Test 123." Now go back to the rule and uncheck the "Sub" box and then reload the test page. Note that the User-Agent now displays "Test 123." Since I specified the EXACT URL and then visited that exact URL, I would expect the User-Agent to display "Test 123" both when 'Sub' is unchecked and when it is checked. This means I have yet to be able to create a rule that applies only to a specific URL and not the entire site.
OMG THANK YOU THIS WORKS AMAZING. ITS SO EASY TO USE. ONCE YOU HAVE EVERYTHING SETUP ITS LITERALLY ONE CLICK!! :) 10/10
Not working properly for existing headers
Worked well for me, and it allows me to control configuration by URL, it's very useful to me. Thanks!
totally helps me. it didn't work when I upgraded my chrome to version 76, until reverted back to chrome 75