Windows dev guide

contrib/setup_windows_build_environment.md

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+# How to set up the build environment for Browsh on Windows
+This guide is for those who want to set up the build environment on Windows Command Prompt or Powershell. Since some of the shell scripts are needed to set up the environment, you can just use **Git Bash** to run these scripts.
+
+
+## Setting up Go, NodeJs, and GOPATH
+Download and install Go for Windows at [Go download page](https://golang.org/dl/).
+
+Download and install NodeJs for Windows at [NodeJs download page](https://nodejs.org/en/download/)
+
+Using Command Prompt or Powershell:
+
+Create a go workspace:
+> mkdir go
+
+> cd go
+
+Set GOPATH to current directory.
+> set GOPATH=%cd%
+
+Create subdirectories bin and src within your go directory:
+> mkdir bin
+
+> mkdir src
+
+Add %GOPATH%/bin to your PATH.
+
+## Installing chocolatey and dep
+
+Download and install Chocolatey package manager at [Chocolatey download page](https://chocolatey.org/install).
+
+Using chocolatey package manager run:
+> choco install dep
+
+
+## Installing webpack, web-ext, and Firefox
+> npm install -g --no-audit webpack
+
+> npm install -g --ignore-scripts web-ext
+
+Download and install Firefox for Windows at [Firefox download page](https://www.mozilla.org/en-US/firefox/new/).
+Note: **Version 57 or higher is required.**
+
+
+## Cloning the browsh repository
+Navigate to GOPATH/src and run:
+> git clone https://github.com/browsh-org/browsh.git
+
+
+## Setting up dependencies
+Navigate to browsh/webext and run:
+> npm install
+
+## Building browsh with Git Bash
+Using Git Bash, navigate to browsh/interfacer/contrib and run:
+> ./build_browsh.sh
+
+## Running browsh
+Using three Command Prompts or Powershells:
+
+Navigate to GOPATH/browsh and run:
+> go run ./interfacer/src/main.go --firefox.use-existing --debug
+
+Navigate to browsh/webext and run:
+> webpack --watch
+
+Navigate to browsh/webext/dist and run:
+> web-ext run --verbose
+
+
+
+
+