Perhaps something like the Speed Dial add-on would be interesting to you?

thank you

where are my bookmarks

i have extension but when i open homepage still shows blank

You can set a local image file as your homepage.

Go to Menu -> Options -> Home page for *Homepage and new windows In the Custom URLs... field modify this syntax to your local image file:

file:///C:/Users/RobertJ/Pictures/ParisTrip/EiffelTower.jpg

always be certain to include the file extension.

You may need to re-size the image to fit the area in your browser. There is a Ruler Tool in the Web Console.

You can also set a gif as your Homepage:

file:///C:/Users/RobertJ/Pictures/Nature/Waterfall.gif

here General Startup Restore previous sessionWarn you when quitting the browserAlways check if Firefox is your default browserFirefox is not your default browserMake Default…Firefox is currently your default browser Tabs Ctrl+Tab cycles through tabs in recently used orderOpen links in tabs instead of new windowsWhen you open a link in a new tab, switch to it immediatelyShow tab previews in the Windows taskbar Language and Appearance Fonts and Colors Default fontSizeAdvanced…Colors…