How can I start my react app using a specific browser?

[AFCMS]

I saw in the online documentation that it is possible to use a specific browser then starting my app with npm start using the BROWSER environment variable.

I tried many times with different configurations targeting different installed browsers .

BROWSER=~/dev/firefox-dev/firefox/firefox npm start

BROWSER=brave npm start

Everytime, it just started with my default browser without any additional output.
Any idea why this isn't working?

Edit: Ubuntu 20.04 if it helps

[ephraimduncan]

You can use whereis or which to get the browser path. Then set an environmental variable on your system.

export BROWSER="/path/to/browser"

You can add it your .bashrc or .zshrc

Exit the terminal and open it again. Run npm start to check if it opens in the specified browser.

[AFCMS]

I can use directly my terminal to launch both of brave and ~/dev/firefox-dev/firefox/firefox using exactly these commands.

I tried also with a full path without the ~ but same result.

[ephraimduncan]

Try clearing your cache and try again.

[AFCMS]

What does "clear your cache" exactly means?

[ephraimduncan]

Run:

npm cache clean –force

[AFCMS]

Doesn't work :(

[karprabha]

You can update start in package.json to
"start": "set \"BROWSER=none\" && start chrome http://localhost:3000 -incognito && react-scripts start",
here instead of chrome you can put any of your browser name and remove -incognito if you don't want it to open in incognito

credits: #11873 (comment)