Keybr.com doesn't work. Cannot read records from database
When I try to use this website http://www.keybr.com/, I receive in a pop-up window the following message:
Cannot read records from database Because: A mutation operation was attempted on a database that did not allow mutations.
And of course the website doesn't work properly... The website does work on other browsers though.
Using Firefox 40.0.3 on Windows 10.
All Replies (8)
Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:
- Click the menu button
, choose History, and then "Clear Recent History...".
- Under "Time range to clear", select "Everything".
- Now, click the arrow next to Details to toggle the Details list active.
- From the details list, check Cache and Cookies and uncheck everything else.
- Now click the "Clear Now" button.
Further information can be found in the Delete browsing, search and download history on Firefox article.
Did this fix your problems? Please report back to us!
Thank you.
It didn't work.
I keep getting the same message:
Cannot read records from database Because: A mutation operation was attempted on a database that did not allow mutations."
I feel like it is something more complicated...
Modified by Awilly666
Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- Click the menu button , click Help
and select Restart with Add-ons Disabled.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
- On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
- On Mac: Hold the option key while starting Firefox.
- On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help others with the same problem.
It didn't work.
I keep getting the same message:
Cannot read records from database Because: A mutation operation was attempted on a database that did not allow mutations.
It sounds like it's a problem with Firefox itself...
Can you successfully access the website from the built in Windows Internet Explorer?
The website works in Edge and in Chrome...
The website is working fine on my browser, so it is unlikely that it is a Firefox compatibility issue. If you file a bug report on Bugzilla, the development team will certainly take a look into the issue.
Ok. Thanks.