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while accessing site css and script return 400 bad request

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We are facing one issue in our application. The UI design of this application is breaking when we accessed it via Mozilla firefox browser.

It is working fine in other browsers. We have done a research on this issue and below are the findings we got.

1. When checked the response content using developer tools it was found that the response header has “server” value “Microsoft-HTTPAPI/2.0” instead of “Microsoft-IIS/8.5”. All the javascript/css/images file requests to server are returning with 400 bad request.

2. On further research we have done on this behavior we found that it is something related to HTTP.SYS API component in IIS. We got some related information on this issue from one of the official Microsoft documentation given in below link.

Above said things are the case when we accessed this application in desktop. This application is actually intended to use in mobile devices as well. So below are the behavior of application when accessed in Mozilla browser in Mobile devices.

1. In Apple IPad, it is working fine when taken in Mozilla firefox.

2. In Android device (Mobile/IPad) it is exhibiting same issue explained above when taken in Mozilla firefox browser.

All Replies (3)

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Separate Security Issue: Update your Flash Player Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version: Version Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only> Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers

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Please provide public link(s) (no password) that we can check out. No Personal Information Please !

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This issue can be caused by corrupted Cookies or Cookies that are blocked.

Clear the cache and remove the Cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache:

  • Options/Preferences -> Privacy & Security -> Cached Web Content: "Clear Now"

"Remove the Cookies" from websites that cause problems.

  • Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> cookies: "Show cookies"