At the bottom of the FIrefox you can see the arrow to back, when you go to one page and back to the first page the forward arrow will appears.

I am using firefox via Pale moon. No arrows anywhere

Is this about Firefox on a desktop computer as your user agent would suggest (the thread is tagged as Firefox OS)?

Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible.

• Firefox menu button > Options
• View > Toolbars (press F10 to display the hidden Menu bar)
• Right-click empty toolbar area

Use Toolbar Layout (Customize) to open the Customize window and set which toolbar items to display.

• check that "Bookmarks Toolbar items" is on the Bookmarks Toolbar
• if "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette into the Customize window to the Bookmarks Toolbar

• if missing items are in the toolbar palette then drag them back from the Customize window on the toolbar
• if you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar setup

• https://support.mozilla.org/kb/How+to+customize+the+toolbar
• https://support.mozilla.org/kb/Back+and+forward+or+other+toolbar+items+are+missing

Are you talking about the arrows of the Explorer or Internet Explorer? because if you are talking the arrows of the Explorer the FXOS dont have navigation bar with that buttons, back,forward,copy,paste,delete,etc...

I'm sorry if i didnt understand your question...