This page contains the latest release of the browse model software, at the moment it's a 68Mb download and requires an up to date version of Java installed on your computer, including Java Web Start.

If you encounter any problems running BROWSE, please send an email to the BROWSE Software team at Fera using the email address:

Run the latest release of BROWSE

Version information

The current version is Version 5.3, released on 30 September 2016


THIS BROWSE SOFTWARE IS PUBLISHED FOR TESTING AND REVIEW PURPOSES ONLY. It can be used to calculate exposures for a range of pesticide applications. The software provides default values but users can input their own values.

This browse software is designed to be used in regulatory risk assessments of pesticides but it has not been approved or adopted by authorised regulators and they will not currently accept its results. Users must make themselves familiar with the technical details of the model, which are described in detail in the documents below, and must assess for themselves the software’s suitability for their purposes. This browse software is published on an "as is" basis and no warranty is given that the software will be uninterrupted or error free, that the development of the software and its use do not breach the intellectual property rights of any third party and all other conditions, warranties or other terms, express or implied, whether by statute, common law or otherwise are hereby excluded, including the implied conditions, warranties or other terms as to satisfactory quality, fitness for purpose or the use of reasonable skill and care. Users of this browse software accept full responsibility for its use and Fera Science Ltd. (Fera) shall not in any circumstances have any liability for any losses or damages which may be suffered by users (or any person claiming under or through the user) whether the same are suffered directly or indirectly or are immediate or consequential, and whether the same arise in contract, tort (including negligence) or otherwise to the fullest extent permissible at law.


Click on the links below to download the draft documentation for the current version of the software.



Resident and Bystander

NOTE: ALL DOCUMENTS ARE DRAFTS, PROVIDED FOR REVIEW AND COMMENT, and are subject to change as the project progresses.

System requirements

The following are the minimum and recommended system requirements in order to succesfully run the BROWSE software

Minimum Recommended
Operating System 32bit Windows 7 64bit Windows 7
Java Java version 7 Java version 7
Processor 2Ghz 3Gz quad-core Intel Core i5 (Second generation - "Sandy Bridge") or AMD FX 6300
Memory 3GB, or at least 1200Mb free 4GB, or at least 2Gb free
Disk space 200Mb free on C: 1Gb free on C:

Estimated model execution times

The BROWSE software uses complex probabilistic models to provide a comprehensive simulation, however, this takes a lot of computer processing which can take a very long time on slower computers. BROWSE has been designed to give a reasonable run time on reasonably modern desktop or server processors. Older processors, laptops or very cheap processors will take longer to run some of the BROWSE scenarios. For scenarios that include multiple models, such as boom spraying arable crops which can include 3 different models, BROWSE will take advantage of multiple core processors to run the models at the same time.

Model run times can vary significantly based upon the inputs and the scenario being simulated. For example, an Active Ingredient with a very low vapour pressure will take longer to simulate than one that volatilises quickly.

These run times were measured by running the scenarios in Browse version 3.2 on the recommended hardware using default or standard testing values. For comparison, run times from a low power 'netbook' class of computer are included

Recommended Netbook
Boom spraying Operator 1 minute 10 minutes
Boom spraying Resident Bystander Spray Drift 5 minutes 15 minutes
Boom spraying Resident Bystander Vapour Exposure 5 minutes 15.5 minutes
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