但只要從關於Firefox進去，就會自動更新瀏覽器。 ref 如何知道您的FireFox版本
所以改輸入 about:support 就可以知道你的版本了。
下面是更詳細的資料，ref. FireFox官網
| about: page | Description |
| about: | Displays version and build information and links to the contributors, licensing information and build configuration |
| about:about | Provides an overview of all about: pages available for your current Firefox version |
| about:accounts | Page used by the Sync feature |
| about:addons | Add-ons Manager |
| about:app-manager | App Manager |
| about:buildconfig | Displays the configuration and platform used to build Firefox |
| about:cache | Displays information about the memory, disk, and appcache |
| about:checkerboard | Switches to the checkerboarding measurement page, which allows to detect checkerboarding issues |
| about:compartments | Displayed information about compartments; since Firefox 26, that information can be found in the "Other Measurements" section of about:memory. |
| about:config | Provides a way to inspect and change Firefox preferences and settings |
| about:crashes | Lists all crashes, which happened during the runtime of Firefox (in case the user enabled the crash reporter) |
| about:credits | Lists all contributors to the Firefox project |
| about:customizing | Switches to the customization page, which allows to customize Firefox' UI |
| about:debugging | Switches to the Developer Tools debugging page, which allows you to debug add-ons, tabs and Service Workers |
| about:downloads | Displays all downloads done within Firefox |
| about:healthreport | Displays performance information of Firefox (in case the user enabled the health report) |
| about:home | Start page of Firefox when opening a new window |
| about:license | Displays licensing information |
| about:logo | Firefox logo |
| about:memory | Provides a way to display memory usage, save it as report and run the GC and CC |
| about:mozilla | Special page showing a message from "The Book of Mozilla" |
| about:networking | Displays networking information |
| about:newtab | Start page when opening a new tab |
| about:performance | Displays memory and performance information about Firefox subprocesses/add-ons/tabs |
| about:plugins | Displays information about installed plugins |
| about:preferences | Firefox settings (also available through Firefox menu > Options) |
| about:privatebrowsing | Start page when opening a private window |
| about:profiles | Display and manage Firefox profiles |
| about:reader | Indicates a web page has Firefox Reader View turned on. See Firefox Reader View for clutter-free web pages |
| about:rights | Displays rights information |
| about:robots | Special page showing notes about robots |
| about:serviceworkers | Displays currently running Service Workers |
| about:sessionrestore | Session restoration (displayed after a Firefox crash) |
| about:support | Troubleshooting information (also available through Firefox menu > ? (question mark) > Troubleshooting Information) |
| about:sync-log | Displays a synchronization protocol related to the Sync feature |
| about:sync-progress | Page displayed after the Sync feature got set up |
| about:sync-tabs | Lists tabs available for synchronization related to the Sync feature |
| about:telemetry | Displays telemetry data collected and sent to Mozilla while Firefox is running (in case the user enabled telemetry) |
| about:webrtc | Information about WebRTC usage |
| about:welcomeback | Information page displayed after Firefox is reset |
