When it works in safe mode, the culprit most likely is an add-on. Find out which add-on is causing the problem, and remove it (or update it, if there's a newer version available).

The only add-on I am using is Lightning Calendar. I have reinstalled that add-on and it's still doing the same thing.

I don't want to operate without Lightning because I use it every day and I depend upon it.

Any other suggestions?

I can get around this problem in the interim because all I am using Account settings for is to change my signature. I can use the option to use a file instead which will get me around the problem.

Are you using the default theme?

I have no idea what the default theme is or how I check it. Can you elaborate please?

Please add the troubleshooting information to your post To find the Troubleshooting information:

• Open Help (or click on three-line-icon and select Help)
• Choose Troubleshooting Information
• Use the button Copy to clipboard to select all. Do not check box "Include account names"!
• Paste this in your post.

rest of trouble shooting info that must have filled the maximum allowed and didn't get written to my reply.

print.tmp.printerfeatures.HL-2130-series.paper.2.height_mm 420 print.tmp.printerfeatures.HL-2130-series.paper.2.is_inch false print.tmp.printerfeatures.HL-2130-series.paper.2.name A3 print.tmp.printerfeatures.HL-2130-series.paper.2.width_mm 297 print.tmp.printerfeatures.HL-2130-series.paper.3.height_mm 279 print.tmp.printerfeatures.HL-2130-series.paper.3.is_inch true print.tmp.printerfeatures.HL-2130-series.paper.3.name Letter print.tmp.printerfeatures.HL-2130-series.paper.3.width_mm 215 print.tmp.printerfeatures.HL-2130-series.paper.4.height_mm 355 print.tmp.printerfeatures.HL-2130-series.paper.4.is_inch true print.tmp.printerfeatures.HL-2130-series.paper.4.name Legal print.tmp.printerfeatures.HL-2130-series.paper.4.width_mm 215 print.tmp.printerfeatures.HL-2130-series.paper.5.height_mm 431 print.tmp.printerfeatures.HL-2130-series.paper.5.is_inch true print.tmp.printerfeatures.HL-2130-series.paper.5.name Tabloid print.tmp.printerfeatures.HL-2130-series.paper.5.width_mm 279 print.tmp.printerfeatures.HL-2130-series.paper.6.height_mm 254 print.tmp.printerfeatures.HL-2130-series.paper.6.is_inch true print.tmp.printerfeatures.HL-2130-series.paper.6.name Executive print.tmp.printerfeatures.HL-2130-series.paper.6.width_mm 190 print.tmp.printerfeatures.HL-2130-series.paper.count 7 print.tmp.printerfeatures.HL-2130-series.plex.0.name default print.tmp.printerfeatures.HL-2130-series.plex.count 1 print.tmp.printerfeatures.HL-2130-series.resolution.0.name default print.tmp.printerfeatures.HL-2130-series.resolution.count 1 print.tmp.printerfeatures.HL-2130-series.supports_colorspace_change false print.tmp.printerfeatures.HL-2130-series.supports_downloadfonts_change false print.tmp.printerfeatures.HL-2130-series.supports_jobtitle_change false print.tmp.printerfeatures.HL-2130-series.supports_orientation_change true print.tmp.printerfeatures.HL-2130-series.supports_paper_size_change true print.tmp.printerfeatures.HL-2130-series.supports_plex_change false print.tmp.printerfeatures.HL-2130-series.supports_printincolor_change true print.tmp.printerfeatures.HL-2130-series.supports_resolution_change false print.tmp.printerfeatures.HL-2130-series.supports_spoolercommand_change false print.tmp.printerfeatures.Lexmark-E120n.can_change_colorspace false print.tmp.printerfeatures.Lexmark-E120n.can_change_downloadfonts false print.tmp.printerfeatures.Lexmark-E120n.can_change_jobtitle false print.tmp.printerfeatures.Lexmark-E120n.can_change_num_copies true print.tmp.printerfeatures.Lexmark-E120n.can_change_orientation true print.tmp.printerfeatures.Lexmark-E120n.can_change_paper_size true print.tmp.printerfeatures.Lexmark-E120n.can_change_plex false print.tmp.printerfeatures.Lexmark-E120n.can_change_printincolor true print.tmp.printerfeatures.Lexmark-E120n.can_change_resolution false print.tmp.printerfeatures.Lexmark-E120n.can_change_spoolercommand false print.tmp.printerfeatures.Lexmark-E120n.colorspace.0.name default print.tmp.printerfeatures.Lexmark-E120n.colorspace.count 1 print.tmp.printerfeatures.Lexmark-E120n.has_special_printerfeatures true print.tmp.printerfeatures.Lexmark-E120n.orientation.0.name portrait print.tmp.printerfeatures.Lexmark-E120n.orientation.1.name landscape print.tmp.printerfeatures.Lexmark-E120n.orientation.count 2 print.tmp.printerfeatures.Lexmark-E120n.paper.0.height_mm 210 print.tmp.printerfeatures.Lexmark-E120n.paper.0.is_inch false print.tmp.printerfeatures.Lexmark-E120n.paper.0.name A5 print.tmp.printerfeatures.Lexmark-E120n.paper.0.width_mm 148 print.tmp.printerfeatures.Lexmark-E120n.paper.1.height_mm 297 print.tmp.printerfeatures.Lexmark-E120n.paper.1.is_inch false print.tmp.printerfeatures.Lexmark-E120n.paper.1.name A4 print.tmp.printerfeatures.Lexmark-E120n.paper.1.width_mm 210 print.tmp.printerfeatures.Lexmark-E120n.paper.2.height_mm 420 print.tmp.printerfeatures.Lexmark-E120n.paper.2.is_inch false print.tmp.printerfeatures.Lexmark-E120n.paper.2.name A3 print.tmp.printerfeatures.Lexmark-E120n.paper.2.width_mm 297 print.tmp.printerfeatures.Lexmark-E120n.paper.3.height_mm 279 print.tmp.printerfeatures.Lexmark-E120n.paper.3.is_inch true print.tmp.printerfeatures.Lexmark-E120n.paper.3.name Letter print.tmp.printerfeatures.Lexmark-E120n.paper.3.width_mm 215 print.tmp.printerfeatures.Lexmark-E120n.paper.4.height_mm 355 print.tmp.printerfeatures.Lexmark-E120n.paper.4.is_inch true print.tmp.printerfeatures.Lexmark-E120n.paper.4.name Legal print.tmp.printerfeatures.Lexmark-E120n.paper.4.width_mm 215 print.tmp.printerfeatures.Lexmark-E120n.paper.5.height_mm 431 print.tmp.printerfeatures.Lexmark-E120n.paper.5.is_inch true print.tmp.printerfeatures.Lexmark-E120n.paper.5.name Tabloid print.tmp.printerfeatures.Lexmark-E120n.paper.5.width_mm 279 print.tmp.printerfeatures.Lexmark-E120n.paper.6.height_mm 254 print.tmp.printerfeatures.Lexmark-E120n.paper.6.is_inch true print.tmp.printerfeatures.Lexmark-E120n.paper.6.name Executive print.tmp.printerfeatures.Lexmark-E120n.paper.6.width_mm 190 print.tmp.printerfeatures.Lexmark-E120n.paper.count 7 print.tmp.printerfeatures.Lexmark-E120n.plex.0.name default print.tmp.printerfeatures.Lexmark-E120n.plex.count 1 print.tmp.printerfeatures.Lexmark-E120n.resolution.0.name default print.tmp.printerfeatures.Lexmark-E120n.resolution.count 1 print.tmp.printerfeatures.Lexmark-E120n.supports_colorspace_change false print.tmp.printerfeatures.Lexmark-E120n.supports_downloadfonts_change false print.tmp.printerfeatures.Lexmark-E120n.supports_jobtitle_change false print.tmp.printerfeatures.Lexmark-E120n.supports_orientation_change true print.tmp.printerfeatures.Lexmark-E120n.supports_paper_size_change true print.tmp.printerfeatures.Lexmark-E120n.supports_plex_change false print.tmp.printerfeatures.Lexmark-E120n.supports_printincolor_change true print.tmp.printerfeatures.Lexmark-E120n.supports_resolution_change false print.tmp.printerfeatures.Lexmark-E120n.supports_spoolercommand_change false Graphics GPU #1 Description Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile Vendor ID Intel Open Source Technology Center Device ID Mesa DRI Intel(R) Sandybridge Mobile Driver Version 3.0 Mesa 10.1.3 Features WebGL Renderer Intel Open Source Technology Center -- Mesa DRI Intel(R) Sandybridge Mobile -- 3.0 Mesa 10.1.3 AzureCanvasBackend skia AzureCanvasAccelerated 0 AzureFallbackCanvasBackend none AzureContentBackend skia CairoUseXRender 0 JavaScript Incremental GC 1 Accessibility Activated 0 Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.13.1 4.13.1 NSS 3.28.6 3.28.6 NSS Util 3.28.6 3.28.6 NSS SSL 3.28.6 3.28.6 NSS S/MIME 3.28.6 3.28.6

Hi Allen, Try this:

1. Go to [=] > Help > Troubleshooting Information, then click on Open Folder.
2. Close Thunderbird.
3. Delete (or rename) the file localstore.rdf

That file contains your your window and toolbar customizations. Either there's a setting you haven't specified or the file itself is corrupt, and deleting it will cause a new file from default settings to be created the next time you run Thunderbird. Safe Mode uses a separate localstore file, which might be why the issue is not occurring in safe mode.

I'm sorry to say that your suggestion did not work.

I renamed the file localstore.rdf to localstore_old.rdf and then loaded TB and tried to get to the Account Settings and it would not. Not only that, when I tried to use my preferences to show the remote content in another message it just did nothing.

When I looked at the folder, TB had not recreated the file localstore.rdf .

I have since restored localstore.rdf , started TB again and this time it did allow me to select my preference to show the remote content in that same message.

I have discovered that the info is too large (>10,000 characters) and although I post it, it gets rejected.

The full information is in a text file but it will not accept it because it isn't an image file.

If you wish I can email it to you.

The only other thing that I can do is to post the first 10,000 characters.

Pls advise

Allen

re : The only other thing that I can do is to post the first 10,000 characters.

Yes, please do that.

AS the default toolbar info works in safe mode, please Try this:

Help > Troubleshooting Information, then click on Open Folder. Close Thunderbird.

Please delete (or rename) the following files; they will be recreated on startup.

• session.json
• xulstore.json

Start Thunderbird as normal

Please report back on results.

Bingo Toad-Hall!

That worked and I can now access Account settings. I am assuming that there is now no need to post the first 10,000 characters of the troubleshooting document.

Thank you very much.

As a matter of interest, what are those 2 files used for?

As a matter of interest if have run diff -y on those files with this result:-

allenb@arb-P7812 ~/.thunderbird/w388arwk.default $ diff -y session.json session_old.json {"rev":0,"windows":[{"type":"3pane","tabs":{"rev":0,"selected | {"rev":0,"windows":[{"type":"3pane","tabs":{"rev":0,"selectedallenb@arb-P7812 ~/.thunderbird/w388arwk.default $ allenb@arb-P7812 ~/.thunderbird/w388arwk.default $ diff -y xulstore.json xulstore_old.json {"chrome://messenger/content/addressbook/addressbook.xul":{"W | {"chrome://messenger/content/SearchDialog.xul":{"dateCol":{"oallenb@arb-P7812 ~/.thunderbird/w388arwk.default $ Does this give any clue?

session.json will contain the default toolbar layout and selections you choose. They are supposed to be updated and saved when you exit Thunderbird, so they are auto used next time you start.

xulstore.json is used to store all Toolbar, window layout and size/position settings. It is safe to delete that file as it will get auto recreated when Thunderbird is restarted.

It would seem one or both of these files had become corrupted.

There are some programs that can 'clean up' certain files. Programs like 'CCLeaner' or some Anti-Virus products can also be set to clean up files like session, password etc. It is probably a good idea to not allow those products to clean up any Thunderbird files or folders.

Good to hear all is ok again.