@pyroJan 14.2004 — #Did you hit view -> source? Tabs do not show up in the browser display, so my guess is that it is working, just not how you expected.
@VITSUSAJul 14.2020 — #You should try to search on Google to find out the solutions first, there you can find multiple answers of this question. Click on the mentioned hyperlink to know more - https://bit.ly/2C1ODou