Update screenshots in README.md

[miketaylr]

They're out of date, and we don't support the Safari add-on anymore.

[architajain12]

I've edited the screenshots.
It doesn't show the added extensions on the same screen on Firefox (Android) in the latest version, so I had to add two separate screenshots for the mobile version.
Kindly let me know the next steps regarding this contribution.

[miketaylr]

Kindly let me know the next steps regarding this contribution.

Hi @architajain12! Are you applying for Outreachy? If so, there's a step before applicants jump into the contribution (where you run tests and send me an email) -- double check the instructions and we'll go from there!

[architajain12]

Hello, @miketaylr ! Yes, I am applying for Outreachy. I have sent you an email regarding the tests I ran. Kindly guide me further.
Thank you!

[miketaylr]

It doesn't show the added extensions on the same screen on Firefox (Android) in the latest version, so I had to add two separate screenshots for the mobile version.

@architajain12 can you explain what you mean here? If you install https://addons.mozilla.org/en-US/firefox/addon/webcompatcom-reporter/ in the latest version of Firefox for Android, you should be able to see a "Report Site Issue" menu item when you click on the 3 dot menu in the top-right. It would be cool if we could include that in the screenshot.