Direct answer
The short version
Use Firefox Back when the previous destination is an earlier page in the active tab. Select another tab when the page is already open elsewhere, use Recently Closed Tabs when it was closed, and use macOS window controls for another Firefox window. ReturnFast currently restores Firefox at the app and window level rather than selecting an exact tab by URL.
Key takeaways
- Firefox Back changes the active tab’s page history; it does not select another tab.
- Reopen Closed Tab restores a closed object and is different from ordinary Back navigation.
- Firefox shortcuts can be customized in current versions, so menus and Firefox settings are the reliable source of truth.
- ReturnFast’s Firefox support is window-level, unlike exact-open-URL matching in supported Chromium browsers.
Separate Firefox page, tab, window, and recovery actions
A browser window contains tabs, and each tab carries its own page trail. If a link replaced the page in the active tab, use Back. If the link opened a new tab, the original page is still a sibling destination and should be selected rather than reconstructed.
A closed tab no longer participates in normal navigation. Mozilla documents Reopen Closed Tab and Recently Closed Tabs for that recovery case. A different Firefox window belongs to the macOS or Firefox window-selection layer.
- Earlier page in this tab: Firefox Back.
- Another open page: Firefox tab selection or tab search.
- Another Firefox window: Window menu, same-app cycling, or App Exposé.
- Closed tab or window: Firefox’s recently closed controls.
- Previous location in another app: app switching or chronological Back.
Verify shortcuts instead of assuming every Firefox setup matches
Mozilla’s current documentation notes that many Firefox keyboard shortcuts can be customized. Keyboard layouts, text-field focus, extensions, and custom mappings can also affect what a key combination does.
Use the History and Window menus to verify available commands in the current context. If Back is disabled, the active tab has no earlier recorded page even when a similar page remains open elsewhere.
Confirm the active tab
Read the title and address before changing its history.
Check the menu
Verify Back, Forward, and recently closed actions in the current Firefox setup.
Change retrieval layers
Use tab or window selection when page history does not contain the target.
Use window-level return as the bridge back into Firefox
Firefox knows its tabs and pages, but not the editor file, Finder folder, or terminal window used around the browsing session. macOS can activate Firefox and raise a window without selecting a precise internal page.
ReturnFast uses app- and window-level fallback for Firefox. It can return to a matching Firefox window when available, then Firefox-native tab and page history take over. It does not currently match an exact Firefox URL.
For durable research, record important sources outside the open-tab set. Recent navigation is useful for return, not permanent citation storage.
Further reading and product details
Frequently asked questions
Does Firefox Back switch to the previous tab?
No. Back changes the webpage history of the active tab. Use Firefox tab controls to select another open tab.
What is the difference between Back and Reopen Closed Tab?
Back visits an earlier page in an existing tab. Reopen Closed Tab restores a tab that is no longer open.
Can ReturnFast select an exact Firefox tab?
Not currently. Firefox receives app- and window-level restoration rather than the exact URL matching available for supported Chromium browsers.