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Absent Member.. jimboling Absent Member..
Absent Member..

Browsers IE vs. FF

Our environment currently:

  1. Web Apps: IE 11 (company standard) on Win7
  2. vuGen: LR11 is our production environment; we are configuring and testing out LR 12.5
    • When used standalone, FF (latest version) on Win7.
    • When used on the LR server (which is pretty common), FF on Win2008 R2 SP1

We typically get much further with FF than with IE, so we use FF for load testing even though IE is our standard browser. Our assumption is that for load testing the difference doesn't make a significant impact on the results.

Is this reasonable, or would you expect that we should be able to use IE just as well as FF? If so, are there guidelines about the difference between the two that we should be aware of?


2 Replies
Absent Member.. Alftio Absent Member..
Absent Member..

Re: Browsers IE vs. FF


Yes it is possible to find testing differences but  won't be a big difference even it will depen more on the goals and types of test that you will be executing for the objects that should be under test.

If the application under test is cross-browser compatible and accomplish the recording requirements for Vugen you can use the mentioned browsers. When you run a Web Vuser that accesses a web-site, the Vuser does not use an actual browser to
access the site. Instead, the Vuser emulates a browser accessing the site.


ldr-LoadRunner Super Contributor.
Super Contributor.

Re: Browsers IE vs. FF

What do you mean by "much further"? Are you facing issues during recording with Internet Explorer? It depends on the application, or does it happen for anything you record in IE? Security in an Application, for example, might make a difference during recording, as browsers manage them differently.

 ** As a note, LoadRunner 11 is quite old.. it should not support IE 11 (if this is a scenario you are testing, but it sounds like you are talking about v12.5x only).

Again, there shouldn't be any differences during replay after a script was recorded. You would only need to verify the User-Agent header string (Run-Time Settings > Browser Emulation) being sent to the Server (if at all necessary for your application).

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