You will get lots of applications, softwares and add-ons to split the screen but you can split the screen with an extension in your chrome and mozilla browser.
How to split the screen in chrome browser:-
1.) Go to Tab Scissors and click to Add to Chrome option in the upper right hand of the page.
2.) Confirm the addition of this extension in your chrome browser by selecting Add option.
3.) The extension of Tab Scissor is added in your google chrome and you can see a scissor icon on the upper right hand side of the address bar.
How It works:-
To split the screens into two equal parts, just click on the tab from where you want to split the screen. Now click on the scissor icon which is just at the right of the address bar and on clicking, it will split the screen into two equal halves. The tabs on the left side of the selected tab will remain in the left window and the tabs right to the selected tab will move to the other window. You can either split the left or right window again. If you want to rejoin all the window then again there is an extension which you can add in your google chrome. The name of the extension is Tab Glue . Just add this extension in your google chrome browser like you added the Tab Scissor extension. Tab glue will simply add the two windows together and put all the tabs in a single window in a single click.
How to split the screen in Mozilla:- To split the screen in mozilla browser , we will use Tile Tabs add-ons. You can arrange the tiles in horizontal,vertical or in grid.
Credits:- Yuvraj Salaria