Chrome: The battle between Chrome and Firefox as our favourite browsers has raged for years with no clear winner. If you'd rather not commit to just one browser, Open with Firefox allows you to quickly jump out of Chrome. You can also get Open in Chrome for Firefox for the reverse process.
The Open with Firefox extension simply allows you to quickly open the tab you're working on in Firefox. This is useful if you have a tab that's not compatible for some reason, or if you just want to avoid bogging down Chrome with a resource-heavy site. Open in Chrome performs a similar function, though you can choose to open just one tab in Chrome or all of your currently open tabs. Between these two extensions, it should be much easier to swap between both of your browsers.
Open in Firefox [Chrome Web Store]
Open in Chrome [Firefox Add-Ons]