Freeze tab option

[Mozilla2048]

An option to prevent the tab from reloading/redirecting/closing until you "unfreeze." Would be useful for certain news sites that automatically reload every few minutes while I'm reading the article. If the user presses a link, the close button, the reload button or hits F5/Ctrl+R, a prompt appears, saying "you have frozen this tab. To close, reload or visit another page, you must unfreeze it first. Do you want to unfreeze this tab?" Should be useful for sites (forms to fill in for example) that you don't want to accidentally reload, but that don't automatically display the "This page is asking you to confirm its closure" message. Essentially, the freeze tab option would be an option that manually enables the "This page is asking you to confirm..." message, and blocks automatic redirections/reloads.
Could be an option in the tab right-click menu, a button in the menu bar or a keyboard shortcut.

[igorlogius]

https://bugzilla.mozilla.org/show_bug.cgi?id=1752747