Firefox Downloads not visible in Download Manager since FF 16 and now update to 17 still same issue... check the show downloads and the rest even resting the download folder..
You can update Firefox to the latest: https://www.mozilla.org/en-US/firefox/new/
or via Firefox Help (Alt + H) > About Firefox.
Please also make sure that Remember my browsing history and download history is enabled in Tools (Alt + T) > Options > Privacy, and also, if Clear history when Firefox closes is enabled, click Settings and deselect Download History.
If problems persist, you can also try deleting downloads.sqlite in the Firefox Profile Folder after exiting Firefox.
To open the profile folder via Firefox: Help (Alt + H) > Troubleshooting Information > Show Folder.
If the settings adjustment fails, you can reset Firefox and start afresh. The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.
To Reset Firefox do the following:
Further information can be found in the Refresh Firefox - reset add-ons and settings article.
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You have a corrupted user agent that identifies you as Firefox/10.
nothing working still when the download finished it get removed from the downloads window...
Trying to avoid a reset :/
Thanks a lot for the adivces though, tried them all
Can you confirm that you remember downloads?
Are they also absent in the download manager while downloading?
Do you see all downloads in the Downloads folder in the Bookmarks and History Manager (Library)?
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
Do you see the downloaded files in the Downloads folder in the History Manager (Library)?