can you change other settings? Like add a signature?

I can add a signature, it was still there, even after restarting the computer.¶ If it helps, the other significant problem is with subfolders in local folders, I often (but not always) have to open them in a new tab to see the messages, but once I do the messages are visible in the usual way. Repairing the folder makes no difference.

I am still stumbling along without the button to allow remote content. I really need to fix this. In the interest of completely describing all issues:

1. Allow/disallow button missing
2. Some sub-folders not opening properly (if I open them in a new tab, then close the tab the folder is open)
3. Inbox of primary email account always opens with "# This Source Code Form . . ." and I can not delete it.
4. Please HELP, I have tried all fixes I have found to no avail.

Please restart Thunderbird with addons disabled.

In Thunderbird 'Help' > 'Restart with add-ons disabled.'

If it now works then it is possible one of your addons is causing a conflict. You would need to restart as normal, access the Addons and disable one at a time, restarting each time to see if it starts to work, then when you know which addon it is, see if there is an update for that addon.

Please report back on results.

Also check this:

'Tools' > 'Options' > 'Advanced' > 'General' tab OR 'Menu icon' > 'Options' > 'Options' > 'Advanced' > 'General' tab

click on 'Config Editor' button - it will say to be careful :)

In search type: default.image Look for this line: permissions.default.image The Value needs to be : 1 If it is not 1 then double click on the line to get a pop up window and enter the number 1 and click on all OK's

Please report back on results.

Toad-Hall; both suggestions were among the first I tried.

As the issue title says "permissions.default.image reverts to 2" The only active add-on is Lightning (calendar). Talkback is disabled and incompatible. However even with them both disabled the problem persists.

Thanks for the suggestions though.

I've done a bit of reading around bugzilla and this bug was mentioned. https://bugzilla.mozilla.org/show_bug.cgi?id=736045 It was also not possible to reset the value directly into the prefs.js file and so the conclusion was that something was amiss with the actual installation/program and not the profile itself.

Please uninstall all versions of Thunderbird program. Start > Settings > Control Panel > Programs & Features select Thunderbird and click on 'uninstall'.

Make sure there are no aditional versions of Thunderbird.

Then download and install from this link, choosing the prefered language and download for your OS: https://www.mozilla.org/en-US/thunderbird/all/

Report back on results.

Well, I learned a little more. After reinstalling as suggested the problem still persists. Tried changing the default.image value to 1, worked (although I saw no button, that could be the unread email available). Checking that value at every step along the way, it reset to 2 as when I closed and reopened Thunderbird.

Conclusion, yes, default.image set to 2 is the problem but something is resetting it back to 2 whenever I close the program.

Tried (again) with add-ons disabled, left them disabled this time. Still, the value reverted to 2. It appears Thunderbird itself, not an add-on is changing the value.

p.s. operating with default.image set to 1 (without restarting) also resolved the folders issues.

Confirmed, the Options button is back ----- IF I set default.image to 1 each time I open Thunderbird. More a workaround than a fix, but progress.

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.

I doubt this will move this a lot further to a solution. But it is a step that can not be ignored.

What security / Optimization software do you have installed? Anti virus, ccleaner memory compressors etc. Check the file properties for last accessed and updated for the prefs.js file Do they update on closing and only then?

Open the prefs.js file in notepad. scroll around in it. Is there anything that looks like corruption? (not text) the file is a text file and everything should appear basically as any other Unicode text file. You do not have to understand the text to see something that looks odd in the context.

Application Basics

   Name: Thunderbird
   Version: 45.2.0
   User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0
   Profile Folder: Show Folder

             (Local drive)
   Application Build ID: 20160630070546
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, , (pop3) pop.east.cox.net:110, plain, 0
     OUTGOING: , smtp.east.cox.net:25, plain, passwordCleartext, true
     OUTGOING: , smtp.east.cox.net:25, plain, passwordCleartext, false

   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (pop3) pop.east.cox.net:110, plain, 0
     OUTGOING: , smtp.east.cox.net:25, plain, passwordCleartext, true

   account4:
     INCOMING: account4, , (pop3) pop.east.cox.net:110, plain, 0
     OUTGOING: , smtp.east.cox.net:587, alwaysSTARTTLS, passwordEncrypted, true

   account5:
     INCOMING: account5, , (pop3) pop3.live.com:995, SSL, passwordCleartext
     OUTGOING: , smtp.live.com:587, alwaysSTARTTLS, passwordCleartext, true

   account6:
     INCOMING: account6, , (pop3) pop.cox.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.cox.net:465, SSL, passwordCleartext, true

   account7:
     INCOMING: account7, , (pop3) pop.cox.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.cox.net:465, SSL, passwordCleartext, true

   account8:
     INCOMING: account8, , (pop3) pop.cox.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.cox.net:465, SSL, passwordCleartext, true

   account9:
     INCOMING: account9, , (pop3) pop.cox.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.cox.net:465, SSL, passwordCleartext, true

   account10:
     INCOMING: account10, , (pop3) pop.cox.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.cox.net:465, SSL, passwordCleartext, true

 Crash Reports

 Extensions
   Lightning, 4.7.2, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   Talkback, 1.5.0.2, false, talkback@mozilla.org

Important Modified Preferences

   Name: Value

     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     dom.apps.reset-permissions: true
     extensions.lastAppVersion: 45.2.0
     font.name.monospace.el: Consolas
     font.name.monospace.tr: Consolas
     font.name.monospace.x-baltic: Consolas
     font.name.monospace.x-central-euro: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.tr: Calibri
     font.name.sans-serif.x-baltic: Calibri
     font.name.sans-serif.x-central-euro: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.tr: Cambria
     font.name.serif.x-baltic: Cambria
     font.name.serif.x-central-euro: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.tr: 14
     font.size.fixed.x-baltic: 14
     font.size.fixed.x-central-euro: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.tr: 17
     font.size.variable.x-baltic: 17
     font.size.variable.x-central-euro: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     gfx.crash-guard.d3d11layers.appVersion: 45.2.0
     gfx.crash-guard.d3d11layers.deviceID: 0x13c0
     gfx.crash-guard.d3d11layers.driverVersion: 21.21.13.7254
     gfx.crash-guard.d3d11layers.feature-d2d: true
     gfx.crash-guard.d3d11layers.feature-d3d11: true
     gfx.crash-guard.glcontext.appVersion: 45.2.0
     gfx.crash-guard.glcontext.deviceID: 0x13c0
     gfx.crash-guard.glcontext.driverVersion: 10.18.13.6881
     gfx.crash-guard.glcontext.gfx.driver-init.direct3d11-angle: true
     gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle: true
     gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-d3d11: false
     gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-warp: false
     gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-try-d3d11: true
     gfx.crash-guard.status.d3d11layers: 2
     gfx.crash-guard.status.glcontext: 2
     gfx.direct2d.disabled: false
     gfx.direct3d.last_used_feature_level_idx: 0
     layers.acceleration.disabled: false
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: 7f572b45-9c98-421e-82de-c5bc6313053
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1471799088
     places.history.expiration.transient_current_max_pages: 104858
     places.history.expiration.transient_optimal_database_size: 167772160
     plugin.importedState: true
     plugin.state.flash: 0
     print.printer_HP_DeskJet_1220C.print_bgcolor: false
     print.printer_HP_DeskJet_1220C.print_bgimages: false
     print.printer_HP_DeskJet_1220C.print_colorspace:
     print.printer_HP_DeskJet_1220C.print_command:
     print.printer_HP_DeskJet_1220C.print_downloadfonts: false
     print.printer_HP_DeskJet_1220C.print_duplex: -437918235
     print.printer_HP_DeskJet_1220C.print_edge_bottom: 0
     print.printer_HP_DeskJet_1220C.print_edge_left: 0
     print.printer_HP_DeskJet_1220C.print_edge_right: 0
     print.printer_HP_DeskJet_1220C.print_edge_top: 0
     print.printer_HP_DeskJet_1220C.print_evenpages: true
     print.printer_HP_DeskJet_1220C.print_footercenter:
     print.printer_HP_DeskJet_1220C.print_footerleft: &PT
     print.printer_HP_DeskJet_1220C.print_footerright: &D
     print.printer_HP_DeskJet_1220C.print_headercenter:
     print.printer_HP_DeskJet_1220C.print_headerleft: &T
     print.printer_HP_DeskJet_1220C.print_headerright: &U
     print.printer_HP_DeskJet_1220C.print_in_color: true
     print.printer_HP_DeskJet_1220C.print_margin_bottom: 0.5
     print.printer_HP_DeskJet_1220C.print_margin_left: 0.5
     print.printer_HP_DeskJet_1220C.print_margin_right: 0.5
     print.printer_HP_DeskJet_1220C.print_margin_top: 0.5
     print.printer_HP_DeskJet_1220C.print_oddpages: true
     print.printer_HP_DeskJet_1220C.print_orientation: 0
     print.printer_HP_DeskJet_1220C.print_page_delay: 50
     print.printer_HP_DeskJet_1220C.print_paper_data: 1
     print.printer_HP_DeskJet_1220C.print_paper_height: 11.00
     print.printer_HP_DeskJet_1220C.print_paper_name:
     print.printer_HP_DeskJet_1220C.print_paper_size_type: 0
     print.printer_HP_DeskJet_1220C.print_paper_size_unit: 0
     print.printer_HP_DeskJet_1220C.print_paper_width: 8.50
     print.printer_HP_DeskJet_1220C.print_plex_name:
     print.printer_HP_DeskJet_1220C.print_resolution: -437918235
     print.printer_HP_DeskJet_1220C.print_resolution_name:
     print.printer_HP_DeskJet_1220C.print_reversed: false
     print.printer_HP_DeskJet_1220C.print_scaling: 1.00
     print.printer_HP_DeskJet_1220C.print_shrink_to_fit: true
     print.printer_HP_DeskJet_1220C.print_to_file: false
     print.printer_HP_DeskJet_1220C.print_unwriteable_margin_bottom: 0
     print.printer_HP_DeskJet_1220C.print_unwriteable_margin_left: 0
     print.printer_HP_DeskJet_1220C.print_unwriteable_margin_right: 0
     print.printer_HP_DeskJet_1220C.print_unwriteable_margin_top: 0
     privacy.donottrackheader.enabled: true

 Graphics

     Adapter Description: NVIDIA GeForce GTX 980
     Vendor ID: 0x10de
     Device ID: 0x13c0
     Adapter RAM: 4095
     Adapter Drivers: C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvd3dumx,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2umx,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2umx,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2umx C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvd3dum,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2um,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2um,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_b07608b795ac4102\nvwgf2um
     Driver Version: 21.21.13.7254
     Driver Date: 8-11-2016
     Direct2D Enabled: true
     DirectWrite Enabled: true (10.0.14393.0)
     ClearType Parameters: ClearType parameters not found
     WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0) -- OpenGL ES 2.0 (ANGLE 2.1.0.316930d51ea9)
     GPU Accelerated Windows: 1/1 Direct3D 11

     AzureCanvasBackend: direct2d 1.1
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: direct2d 1.1

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.12
     4.12

     NSS
     3.21.1 Basic ECC
     3.21.1 Basic ECC

     NSS Util
     3.21.1
     3.21.1

     NSS SSL
     3.21.1 Basic ECC
     3.21.1 Basic ECC

     NSS S/MIME
     3.21.

I had to split Troubleshooting information into 2 posts, too long for 1.

I use Norton Antivirus. "Allow antivirus clients to Quarantine . . ." is not checked.

prefs.js took a few minutes to find and a while longer to figure out how to open. Scanned through it a couple of times but I see nothing out of the ordinary for a text document.

OH, and yes, Date modified for prefs.js updates each time.

Do you also have a user.js file?

Zenos, no user.js for Thunderbird, there is one for Firefox

Could you try this: 'Tools' > 'Options' > 'Advanced' > 'General' tab OR 'Menu icon' > 'Options' > 'Options' > 'Advanced' > 'General' tab

uncheck 'Use hardware acceleration when available'

click on OK

Restart Thunderbird.

Report back on results.

That improved things some. default.image was still set to 2 but the options button showed up for most emails. Interestingly the email where I had to set default.image to 1 to see the remote content was the one from mozilla support notifying me of your post. I had no problem opening folders with this mornings mail but that could just be luck.

okay, it appears the folder problem is not fixed. default.image problem appears to have taken another step toward a fix, if only default.image would stick at 1

Addon extension 'TalkBack' is what used to be the crash reporter (used to diagnose crashes) back in thunderbird2 - apparently it's not used anymore. So let's remove it.

Please uninstall Talkback. 'Tools' > 'Addons' OR 'Menu icon' > 'Addons'

I'm presuming you have permissions.default.image set as 1 Restart Thunderbird

Report back on results.