Protractor support topics

# Supported browsers

## Tests with Protractor test suite (v 4.0.13)

The following are the supported browsers / drivers based on running the Protractor test suite. Since the test suite checks only firefox and chrome, these are the only browsers reported.

## Current supported browsers / drivers

selenium standalone | firefox | chromedriver | chrome
--- | --- | --- | ---
2.53.1 | 47.0.1 | 2.26 | 54

## Investigated

selenium standalone | firefox 47.0.1 | firefox 49.0.1
--- | --- | ---
2.53.1 | pass | fail
3.0.0 | fail | fail

# Driver providers

There are a couple cases where Protractor launches downloaded binaries (from webdriver-manager) without specifying which version to use:

- local driver providers - when no `seleniumAddress`, `directConnect`, saucelabs or browser stack configuration is set
- direct connect - when setting `directConnect` to true

Protractor knows which downloaded binaries to use based on the `update-config.json`. The `update-config.json` is written during the `update` command and provides the path to the current downloaded version and a list of all the binaries previously downloaded.

During the launch of either local driver provider or direct connect, Protractor will launch the last downloaded binary.