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I updated my desktop browser today and now there is an expandable sidebar at the left margin of the window showing tool icons for Tabs from other devices, History and Customize sidebar. I can see how to remove tool icons and how to expand or collapse sidebar but can I remove the sidebar completely? Is this an option? I prefer the old look with the browser web page content extending all the way to the left of the screen, without the narrow vertical sidebar.

When I select "Edit as New Message" in Thunderbird (v52.9.1) on a Mac, the message editor comes up in html mode even if I have set everything to plain text.

I have read all the articles on this and done all the things people have recommended including messing with Advanced options, account settings, etc. However, none of these solutions work.

Attached is a screenshot showing the problem. The first screenshot shows my inbox. The second shot shows that "Edit as new message" comes up in html mode.

Please advise.

The other day I accidentally pressed a keystroke that changed a Firefox setting, and now it thinks I'm on a mobile device/displays sites in mobile view where possible by default. This has persisted despite restarts of the browser and the computer and has been happening since Sunday (Australian time). I've tried opening the Responsive Design dev tool and I've sent screenshots to a techsavvy friend (I'm totally blind and use a screen-reader, so couldn't tell this was happening until I tried to use a site that had a radically different layout in mobile view), and aside from not seeing an exit button or a switch to change device mode, he couldn't tell what was going on.

I'm stuck and need help! I would like to unmobile my Firefox!

I prefer the tabs be below the bookmark bar, and successfully modified the CSS file to do this some time back. Now update 133 has once again pushed them up below the menu bar. What do I have to do to get them back where I want them this time? And why can't you just leave the tab location preference alone when doing updates?

Hello. In the past two days I lose my tabs when I shut down Firefox. I used to be fine using the X at the top right and when I restarted the browser, all my tabs would still be there. Then they started going missing, so I started using the menu option to exit the browser. The tabs still went missing.

Then I noticed the square icon button on the extreme left and have discovered that Firefox has different windows, and that one of them (see attached image) has all my tabs in it, while the current window does not.

I cannot change Window 2 to be the current window. There is no obvious function on the page, nothing in settings and google is useless - I just get pages of discussion of how to tab between different apps on the desktop.

How do I make Window 2 the current window? See image.

Thank you

Copied Thunderbird Profile on old computer to external HDD. Name assigned was zs6…. Installed TBird on new Win10 PC, omitting sign-in procedure. On this PC, clicked Menu, Help, Troubleshooting Info. Opened Profile folder on this PC, left-clicked Roaming, closed TBird. Copied zs6… from ext HDD, pasted onto TBird folder C:\users\owner\appdata\roaming on new PC. Clicked Yes to replace any existing files. Opened \roaming\thunderbird\profiles zs6…. not in there. TBird launches again in Setup. What am I doing wrong?

I updated to version 133 today and was confronted with the vertical tab bar. I did not ask for this or want it, and now I can't get rid of the side bar, in fact I seem to have just made it worse / wider. How can I get rid of this (and block it) It is just taling up space on my screen. Please help.

Am I the only one that finds it almost impossible to change fonts. I can change what I type to Large. But that's all. I can't change anything I Cntrl-V into a message. Or inherit text in the process of a reply.

My Quick Filter Bar has been disappearing for years. I add it back by selecting View-Tools-Quick Filter Bar but eventually it will disappear again. It will remain a few weeks or so and then it will be gone. I don't know the behavior that causes it to disappear. My only guess is that I coincidentally hit some sequence of keys that de-selects the option. Any ideas on how I can prevent this? I have version 52.5.2 (64-bit) but it has occurred for many, many versions. I would very roughly guess it has been occurring for over 6 years.

Thanks, Mike

I haven't upgraded browser versions for a while and I'm now going from 109 to 132. Pretty bad I know.

I'm having a number of issues but for this post I'd like to concentrate on userChrome.css.

In version 109, I had a custom font for the top menu bar, the top menus, the bookmark toolbar, the bookmark toolbar menus, and the right click menus. I did this by including the following in userChrome.css (as per [https://support.mozilla.org/si/questi.../1335097|here]:

1. navigator-toolbox { font-family:"MyFont" !important }

This worked great, but it is no longer working in version 132. Obviously I don't know in which Firefox version this stopped working.

Has this been disabled by Mozilla or has it been changed? If it's been changed, how can I achieve it now?

I'm very grateful for any help!

Made a mistake by changing user_pref("layout.css.devPixelsPerPx" from I think - 0.5 to +0.5 as incoming emails font was miniscule, but made nor difference... so thought it may be a font size, so changed to 12.... Now ginormous and unreadable. Searched through pages here for an answer and got to the prefs.js folder to find this file but it is not there.... I searched with notepad edit search for "layout" but no luck. Any ideas anyone? I tried adding the line user_pref("layout.css.devPixelsPerPx", "1.5"); whilst TB was closed and then opened TB but had made no difference.. :-( Any ideas anyone? TIA Graham

Using Tbird 78.14.0 (64 bit) with Windows 10. I can no longer access the Page Setup screen properly. I suspect it's because I accidentally put a very big value in for the top margin. The print preview for even a short email says it's many pages, there's no text visible on any of those pages, the only part of the Page Setup screen visible is OK and Cancel at the bottom, and I can't get to the top of the screen. I've tried closing and re-opening Tbird to no avail. How can I get to the top of the Page Setup screen to fix the problem?

Before the last update, when you assigned a colored label to the message (e.g., work, important, etc.), the entire title, header of the message, took the chosen color. Now you only see a small tag.

'The previous system was definitely more practical. Can it be reactivated?

All of a sudden, I can't see emails that I know are there because the subject of a previous message in my inbox is underlined. I can find the emails when I search for them by putting in a recipients name. And when they show up the thread column exhibits a red flag (don't know what it means). HELP.

How can I set the email message sort to descending date for all folders in all accounts? With many accounts with many folders each, manually changing the sort from ascending to descending is a lot of needless work. A global default is needed, and if there is one, I can't find it.

I grew too used to the zebra striping pattern in my message list, but could not find a way of implementing it in Thunderbird settings. I'm using version 139.0.2 - aarch64.

I did try to use the code available in this forum, which involves creating a folder "chrome" in the user profile and then a file userChrome.css under it. I did turn on toolkit.legacyUserProfileCustomizations.stylesheets and understand this is not recommended, but it did not make any difference anyways.

Any pointer would be much appreciated.

Up to now I have been using the FireTray add-on, this is no longer working in Thunderbird 60 even if I enable legacy add-ons. I do believe that Thunderbird is making a catastrophic mistake by cutting itself off from a large part of its add-on ecosystem, but I don’t want to debate that here. What I think is really missing is some form of indicator that new e-mail has arrived (not unread but new) that is not transient. If I leave my screen for a while with a minimised TB process running, I will now have to maximise the window and check all accounts (actually, all folders that might receive new mail via filtering) to see if I have missed a new mail notification while I was away. The same applies if I was at the screen but focused on something else. With FireTray I would have seen a change in the tray icon. Now it seems that I have to check the folder pane for a colour change in the names of all candidate accounts or folders. I cannot believe that TB developers want to force us to do constantly inspect the window, so I’d like to know how I am supposed to be able to check if new email has arrived without having to maximise the window. Any suggestions?

Hello community :)

hope everybody is doing well. I´m coming here with with asking for a help.

I´m managing browsers (Google Chrome, MS Edge and Firefox) in my company via GPOs. What we´ve been dealing with since 135 version came up is having the "Did Not Connect: Potential Security Issue error page , Error insufficient cert transparency" while visiting our internal resources.

Despite of having the security.pki.certificate_transparency.disable_for_spki_hashes set up -> main three certificate hashes are correctly added, basically copying the setup from Chromium browsers , where everything works as expected , Firefox is not.

The only way how to make it work is via security.pki.certificate_transparency.disable_for_hosts , which is , of course, not desirable , because of the security risks.

Does anyone face the same issues ?

Thank you very much ya´ll

After the last update the address bar is divided into two parts. One below and the other above. How can I change the settings that I get only a address bar above with two parts. Attached the screen

Hello, I have Win8 with black borders, so I can't read and see inactive tabs at all. (http://i.imgur.com/9feS5wN.png ) I want to change the text color and make it so that the hover effect is displayed at all times. (http://i.imgur.com/wRubuQ3.png )

I found a bunch of different things to do, like "tab:not([selected="true"]" ".tabmail-tab" but none of it works. So which identifier (or whatever it's called) can I use? And how can I achieve the hover effect?

I hope someone can help, thanks in advance :)

Edit: I got the hover effect working, it's in a post on the bottom of the page.