Why are you using adblocker?

Because it blocks ads. Why does it matter? I tried running in Safe Mode but this changed nothing.

Ya, that is what adblockers do. Your video Card Drivers are real, real, bad shape. Just about everything drivers are suppose to do is unsupported, unavailable or blocked.

Can copy/paste about 6inches of in if want on them if want.

Suggest reinstall your Video Card Drivers if Possible. It maybe a rendering problem I am not sure but regardless action needs to be done on your drivers.

May want to compile Firefox 61 to see if that makes a difference as well.

@Pkshadow Thanks for your answer. I have already latest drivers for Intel graphics installed:

$ sudo apt-get install xserver-xorg-video-intel Reading package lists... Done Building dependency tree Reading state information... Done xserver-xorg-video-intel is already the newest version (2:2.99.917+git20160325-1ubuntu1.2). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Also I tried with my NVIDIA graphics card (which has latest proprietary drivers) but it didn't work either. So why could the drivers be a problem then?

I will try your suggestion with Firefox 61, but you mentioned driver problems, so how could this work?

Edit

On Firefox 61.0 it is still not working.

Edit 2

I tried disabling Hardware Acceleration and WebGL as described here but it still doesn't work.

Edit 3

Here I found the data for NVIDIA activated (Awesome Bar still doesn't work): https://ufile.io/4rygq

You can check for problems with the places.sqlite database (bookmarks and history) in the Firefox profile folder.

• use "Verify Integrity" on the "Help -> Troubleshooting Information" (about:support) page

See also:

• http://kb.mozillazine.org/Locked_or_damaged_places.sqlite
• https://support.mozilla.org/en-US/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

If "Verify Integrity" on the "Help -> Troubleshooting Information" (about:support) page cannot repair places.sqlite then remove all places.sqlite files in the Firefox profile folder. Firefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder.

• keep a backup copy of places.sqlite in case a new places.sqlite database has to be created
• http://kb.mozillazine.org/Unable_to_process_the_backup_file_-_Firefox

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

• Help -> Troubleshooting Information -> Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

If you use Sync then best is to disconnect Sync temporarily during troubleshooting.

@cor-el Okay I tried Verify Integrity and it seems that everything is alright. This is the output:

> Task: checkIntegrity + The database is sane > Task: invalidateCaches + The caches have been invalidated > Task: checkCoherence + The database is coherent > Task: expire + Database cleaned up > Task: vacuum + Initial database size is 5120KiB + The database has been vacuumed + Final database size is 5120KiB > Task: stats + Places.sqlite size is 5120KiB + Favicons.sqlite size is 1920KiB + pragma_user_version is 43 + pragma_page_size is 32768 + pragma_cache_size is -2048 + pragma_journal_mode is wal + pragma_synchronous is 1 + History can store a maximum of 104858 unique pages + Table moz_places has 445 records + Table moz_historyvisits has 142 records + Table moz_inputhistory has 0 records + Table moz_hosts has 207 records + Table moz_bookmarks has 554 records + Table moz_keywords has 0 records + Table sqlite_sequence has 0 records + Table moz_anno_attributes has 7 records + Table moz_annos has 308 records + Table moz_items_annos has 266 records + Table sqlite_stat1 has 16 records + Table moz_bookmarks_deleted has 0 records + Table moz_meta has 2 records + Index sqlite_autoindex_moz_inputhistory_1 + Index sqlite_autoindex_moz_hosts_1 + Index sqlite_autoindex_moz_keywords_1 + Index sqlite_autoindex_moz_anno_attributes_1 + Index sqlite_autoindex_moz_bookmarks_deleted_1 + Index moz_places_hostindex + Index moz_places_visitcount + Index moz_places_frecencyindex + Index moz_places_lastvisitdateindex + Index moz_historyvisits_placedateindex + Index moz_historyvisits_fromindex + Index moz_historyvisits_dateindex + Index moz_bookmarks_itemindex + Index moz_bookmarks_parentindex + Index moz_bookmarks_itemlastmodifiedindex + Index moz_places_url_hashindex + Index moz_places_guid_uniqueindex + Index moz_bookmarks_guid_uniqueindex + Index moz_keywords_placepostdata_uniqueindex + Index moz_annos_placeattributeindex + Index moz_items_annos_itemattributeindex + Index moz_bookmarks_dateaddedindex > Task: _refreshUI

Maybe Important

I copied my Firefox profile over from an older computer in a sense that I just copied & pasted the profile folder on my new computer. On this new computer the Awesome Bar is not working. Maybe it is related to that fact? I will try to delete the databases now. Edit: After deleting the places.sqlite database files and restarting Firefox twice, they have been rebuilt. However Awesome Bar is still not working.

On a side note: I don't have any problems with Bookmarks, History, it's even suggesting visited URLs in the URL input field, but the Dropdown with 'all' suggestions is missing. It's also not suggesting open tabs, which should be independent of the databases, right? (I don't have sync of tabs enabled.)

Interestingly the Awesome Bar works with a freshly created profile. So indeed it seems to be a problem with the profile.

Edit

Okay so the solution for me was the following. Since I had synced my data with another device, I just created a new profile, I adjusted all the settings again (manually) and then synced the new profile with my other device to get the data back. Now with this new profile the Awesome Bar works as expected. Though I have no idea why it didn't work before.

By the way: What is the proper way of moving your profile from one computer to another? If just copying the profile folder breaks features such as Awesome Bar this probably requires more investigation.