Update README.md

Author: jespitiaa

README.md

@@ -6,7 +6,8 @@ In order to use the tester, you will have to follow these steps:
 - Get the source code from this repository: Click on Download as Zip and unzip the folder in your machine or clone the repo
 - Install the required modules: Using [Node Package Manager](https://www.npmjs.com/), run `npm install`. This will install the cypress and faker modules, besides a cypress [plugin](https://github.com/Bkucera/cypress-plugin-tab) for tab.
 - Configure the desired parameters: The repository's root folder contains two JSON files which have the configuration parameters for each test. Open them and edit the parameters as needed. You can change the baseURL, the percentage of events, the delay between events, and the number of events.
-- Run the desired tester: For the random tester, run `cypress run --config-file ./monkey-config.json`. For the slightly smarter random tester, run `cypress run --config-file ./smart-monkey-config.json`.
+- Run the desired tester: For the random tester, run `cypress run --config-file ./monkey-config.json`. For the slightly smarter random tester, run `cypress run --config-file ./smart-monkey-config.json`. 
+* Note: The default browser is Electron 78 in headless mode. In order to test another browser, add the `--browser <browser-name-or-path>` option to the run command, indicating which of the [supported browsers](https://docs.cypress.io/guides/guides/launching-browsers.html#Browsers) you want to use
 
 ## The testers
 Cypress is an E2E test runner built over JavaScript. We used this technology due to the facility for managing web pages in a variety of browsers including Chrome, Canary, Edge, Electron, etc. and the record-and-replay functionality. The idea of the first tester is to perform a completely random test on a web application, inspired on a similar tester, the [Android Monkey](https://developer.android.com/studio/test/monkey). The second tester exists due to the high rate of errors and low probability of getting events that change the application's state of the Monkey tester.