Had same issue today in FF 150.0, but it's simple to fix.

Open Firefox In address (URL) bar type: about:config Accept the warning, if you're willing to take the risk In search bar on next screen, type in: browser.tabs.splitView.enabled It will be shown as True Change that to False by clicking the 2-way arrows at right end of that line Done!

Additionally, you can look also at browser.tabs.splitview.hasUsed directly below the one above It's likely set to True - meaning you've used splt view You can change this one to False - meaning you've never used split view, but it really doesn't matter. You only have to change the first one to remove split view from the FF right-click menu.

Hope that helps!

Hello

https://www.reddit.com/r/firefox/comments/1ss4071/possible_to_disable_split_view_when_rightclicking

You can try a userChrome.css file, you can find tutorials on the web.

#context-openlinkinsplitview{display:none!important;}

For information Browser Toolbox https://firefox-source-docs.mozilla.org/devtools-user/browser_toolbox/index.html

A space for users to give product feedback https://support.mozilla.org/en-US/kb/what-mozilla-connect

Ability to edit context menus, remove unnecessary options https://connect.mozilla.org/t5/ideas/ability-to-edit-context-menus-remove-unnecessary-options/idi-p/8003

If you wish, also

Right clicking search results... Do not want to open in new tab

You can try a userChrome.css

#context-openlinkintab{display:none!important;} #context-openlinkinsplitview{display:none!important;}

Why mess around with chrome.css files. Just make the change I posted above and split view will be gone. Images show my FF right context menu with Split View On, and then with Split View OFF.

If you really want to remove Open Link in New Tab too, IDK if there's an about:config setting for that. Otherwise you probably would have to create a chrome.css file.

Hello

A similar question https://support.mozilla.org/en-US/questions/1578278