To restore your previously visited webpages or set specific pages to open on startup,

follow these steps:

1. 1 In the "New Windows and Tabs" section, change the "Homepage and new windows" setting from "Firefox Home (Default)" to "Custom URLs" Then enter the URLs of the webpages you want to open automatically when Firefox starts.

1. 2 Alternatively, if you want Firefox to show your most visited sites and snippets on the new tab page, keep "Firefox Home (Default)" selected but ensure that under "Firefox Home content," the options like "Top Sites" and "Highlights" are checked. This will display your frequently visited pages on the new tab.

1. 3 If you want Firefox to restore your previous session (all tabs from last time), go to the "General" settings (not shown in the image), and under "Startup," check "Restore previous session." This will reopen all tabs from your last browsing session automatically.

1. 4 The blank screen with a blue search bar likely means Firefox is set to open a blank page or a custom page without content. Adjusting these settings as above should bring back your desired start pages or visited sites on startup.

Hi there! Can you update to version 138.0.1 and let us know if this resolves your issue?