Can you otherwise delete history in the History Manager (Library) or in the sidebar?

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
  in case errors are reported close and restart Firefox and retry

See also:

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

Im getting this:

> Task: checkIntegrity - Unable to check favicons.sqlite integrity: Error: Error(s) encountered during statement execution: database disk image is malformed > Task: invalidateCaches - The task queue was cleared by an error in another task. > Task: checkCoherence - The task queue was cleared by an error in another task. > Task: expire - The task queue was cleared by an error in another task. > Task: originFrecencyStats - The task queue was cleared by an error in another task. > Task: vacuum - The task queue was cleared by an error in another task. > Task: stats - The task queue was cleared by an error in another task. > Task: _refreshUI - The task queue was cleared by an error in another task.

but also after a restart.

I had this problem before, it disappeared when I changed from the ESR to normal edition, but now its back again since 3 days.

Well well… sometimes Im lucky…

I deleted "favicons.sqlite" in my profile folder, now I'm getting:

> Task: checkIntegrity + The places.sqlite database is sane + The favicons.sqlite database is sane > Task: invalidateCaches + The caches have been invalidated > Task: checkCoherence + The database is coherent > Task: expire + Database cleaned up > Task: originFrecencyStats + Recalculated origin frecency stats > Task: vacuum + Initial database size is 56320KiB + The database has been vacuumed + Final database size is 51200KiB > Task: stats + Places.sqlite size is 51200KiB + Favicons.sqlite size is 5120KiB + pragma_user_version is 52 + 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 130854 unique pages + Table moz_places has 88573 records + Table moz_historyvisits has 171304 records + Table moz_inputhistory has 91 records + Table moz_hosts has 0 records + Table moz_bookmarks has 34855 records + Table moz_bookmarks_deleted has 13 records + Table moz_keywords has 0 records + Table sqlite_sequence has 0 records + Table moz_anno_attributes has 8 records + Table moz_annos has 766 records + Table moz_items_annos has 182 records + Table sqlite_stat1 has 18 records + Table moz_meta has 7 records + Table moz_origins has 6977 records + Index sqlite_autoindex_moz_inputhistory_1 + Index sqlite_autoindex_moz_hosts_1 + Index sqlite_autoindex_moz_bookmarks_deleted_1 + Index sqlite_autoindex_moz_keywords_1 + Index sqlite_autoindex_moz_anno_attributes_1 + Index sqlite_autoindex_moz_origins_1 + Index moz_places_url_hashindex + Index moz_places_hostindex + Index moz_places_visitcount + Index moz_places_frecencyindex + Index moz_places_lastvisitdateindex + Index moz_places_guid_uniqueindex + 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_bookmarks_guid_uniqueindex + Index moz_keywords_placepostdata_uniqueindex + Index moz_annos_placeattributeindex + Index moz_items_annos_itemattributeindex + Index moz_bookmarks_dateaddedindex + Index moz_places_originidindex > Task: _refreshUI

and I can delete the download list again!

However, before closing this thread:

1) what for ist favicons anyway? I mean it reloads new icons with a fresh start again… no?

2) why/what happend that the file has been corrupted at the first place?

bugzill said

1) what for ist favicons anyway? I mean it reloads new icons with a fresh start again… no?

Favicons are also known as site icons. When you bookmark or visit a page, recent versions of Firefox save its site icon in favicons.sqlite. (Previously these were saved in places.sqlite with the address.)

2) why/what happend that the file has been corrupted at the first place?

I wish we knew! Unfortunately, the "Verify Integrity" function doesn't describe in what way the file is corrupted.

I cannot find where I left off several days ago but here is the problem that recurs for me. My 'Delete' is missing inside the box and the box is not the usual size. This happens several times a day and is rather irritating to have to go back to the menu and try it again.

Hi wahoospa, your Clear Recent History dialog is a different size each time you open it? That's odd; it's usually pretty consistent.

Sometimes the settings file that stores window and dialog dimensions becomes corrupted with nonsensical values. You can rename the file and have Firefox rebuild it. Here's how:

Open your current Firefox settings (AKA Firefox profile) folder using either

• "3-bar" menu button > "?" Help > Troubleshooting Information
• (menu bar) Help > Troubleshooting Information
• type or paste about:support in the address bar and press Enter

In the first table on the page, on the Profile Folder row, click the "Open Folder" button. This should launch a new window listing various files and folders in Windows Explorer.

Leaving that window open, switch back to Firefox and Exit, either:

• "3-bar" menu button > Exit
• (menu bar) File > Exit

Pause while Firefox finishes its cleanup, then rename xulstore.json to something like xulstoreOLD.json. If you see a file named localstore.rdf, it's ancient, you can delete that.

Start Firefox back up and try the Clear Recent History dialog again. Does it display normally?

That mini-reset will hide the menu bar and bookmarks toolbar. You can use one of these methods to show the toolbar list and select the desired bars there:

• right-click (on Mac Ctrl+click) a blank spot on the tab bar (or the "+" button)
• (menu bar) View > Toolbars
  On Windows, tap the Alt key to activate the menu bar temporarily.
• in Customize mode > Toolbars button (see: Customize Firefox controls, buttons and toolbars)

To turn on the Bookmarks Toolbar, Menu Bar, or other bars, click it on the list.

Can you open the System menu of this window via Alt+Space and possibly resize this window?

First time clearing history today and I get the same results.