*:web_editor,portal This commit aims at removing the need to rely on `$.browser`, which was mainly the case to support deprecated and unsupported browsers like MS Internet Explorer or old version of Firefox. Doing so, this commit removes the `data-browser` attribute initialy introduced by odoo/odoo@a7e0b73930 as not needed anymore nowadays and to generally promote "feature detection" instead of "user-agent sniffing" to handle browsers' feature support and edge cases. task-3439226 Part-of: odoo/odoo#133916