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I'm using the 64-bit version of thunderbird and I'm unable to increase the font size of the incoming messages in my inbox. I went to settings, general, Language and Appearance and under advanced changed fonts to 24, 20 and 20 while checking off the font control boxes. None of these changes the size of the text in the body of the text. Any help would be greatly appreciated.

I have visually-induced vertigo/supermarket syndrome.

I have a hard time aviding accidental scrolling in the new print modals. @#$%^ modals. Because of the accidental scrolling, because they scroll in front of other elements in the same window, and because the modals aren't designed for page down, and because they don't integrate with system-level print options, these don't work for me.

So far I've been using the system print dialogues instead of the Firefox and Thunderbird print modals, but I accidentally updated Thunderbird a few months ago, and lost access to the system print dialogues.

When I open `about:preferences` tab, `Downloads` directory is created in my home directory, despite my downloads directory is different. I've read issue 474718 which states that it was fix but i still experience it. Linux x86_64

Hi folks, I had a problem with this back in June 2021 when my previously black background to the menu bar (bookmarks etc) changed to a washed out grey. Chris Ilias and dbben both replied, and Chris sent me a video guide on how to install Photon Colours, which fixed the problem, thanks. However, today the same problem has re-occurred - ie grey background. Unfortunately, when I checked in the Themes menu I found that Photon Colours is no longer there. Grateful if you could tell me if there is a new fix for this so that I can re-instigate the black background to the toolbar. Many thanks Chris

Is there a way to permanently disable red underlining from Firefox spell check? This has only started occurring since an update to Firefox 110 (now on 112), but there seems to be no way to make it go away. I've unchecked the spelling box in preferences, and killed off things in about:config:

extensions.spellcheck.inline.max-misspellings 0 layout.spellcheckDefault 0 services.sync.prefs.sync.layout.spellcheckDefault false services.sync.prefs.sync.spellchecker.dictionary false

I'm using Mac Monterey, and have the global spell check turned off for that. This seems to be a problem specific to Firefox, as it doesn't happen in Chrome (spellcheck off) or Safari. I'd like to remove this entirely, since it's distracting to have it second guessing me whenever I'm typing. The main reason I use Firefox is that it gives me the ability to control many things, particularly in combination with UBlock, but I'm unable to make any progress in removing this persistent work disruption.

I have recently updated to Firefox 106 on two Arch Linux systems. One of them has Firefox View enabled and working by default, another does not. I looked around and tried some options in about:config to enable it, however it did not work and I reverted the changes. I would like to enable Firefox View on this browser as well, and I would like to know how to enable it.

I've just switched to firefox from brave, and theres no button on twitch to enable picture in picture. Using the keyboard shortcut (cmd+option+shift+]) works, but I'd much rather click something on the screen. On brave there used to be a picture in picture button alongside settings, theatre mode, and fullscreen buttons, but on firefox this has been replaced by a clip button. There's no option for it if I right click (this works on youtube), and no option in the address bar for either twitch or youtube. I've tried disabling all my extensions and lowering protections but nothing seems to work.

Embedded videos missing in Firefox but show up in Microsoft Edge. How to fix it?

Example: https://scheerpost.com/2024/03/09/you-are-betraying-your-ancestors-a-message-to-joe-biden-from-the-graveyard-where-his-ancestors-are-buried/

With the new v85 of Firefox... for Microsoft Print to PDF...

the defaults for print headers & footers has changed and is no longer available to edit or even view. It seems as though my settings remain in place for other printing options like my physical printer but even there the options are not editable or viewable.

There used to be a "page setup" option but I have not be able to find this anywhere anymore.

• Bulleted list itemhttps://support.mozilla.org/en-US/kb/how-print-web-pages-firefox#w_changing-the-page-setup

I'm assuming that it has to do with the bug fix for pdf printing but doesn't seem that it should be an intended outcome of the fix.

• https://www.mozilla.org/en-US/firefox/85.0.1/releasenotes/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1689789

Any work arounds anyone knows about or has found?

I'm using freshly-downloaded Firefox version 102.2 on a brand new laptop (Windows 11 Pro version 21H2), and every single extension is showing a "Installation aborted because the add-on appears to be corrupt" message when I try to install. I have tried checking for updates, quitting and reopening firefox, restarting my computer, refreshing firefox, uninstalling and reinstalling firefox, as well as any and all combinations of those. I've scoured these message boards and nothing is working for me. Please help!

How can I completely remove the tab bar and regain 3/4 of an inch of screen space. It would be nice if Mozilla would just have a on/off button for it. I've tried creating a folder called Chrome within my Firefox Profile folder. I then created a text file within that folder and named it userChrome.css. I put this string in the text file #tabbrowser-tabs { visibility: collapse !important; } This did not work, does anyone know the best method for getting rid of the annoying tab bar?

Thank you

already found this same topic, but was archived Had exactly the same problem for weeks now (too lazy to come to the forum, but so exasperated that I'm here now)

I run W10 21H2 up to date, and Thunderbird 102.1.2 I do exactly what is described in cited post which used to work ..(can't say when it stops working) with the same result "BLACK" (only sometimes a quick "flickering" with the chosen color, but "Black is Back

I work on kubuntu 20.04 with plasma 5.18.8 desktop environment. I have a QtCurve-based custom application style, which I almost match with css for GTK apps. Firefox has to be an exception by itself! Not only that, but it changes my ability to customize its interface, from time to time and even changes access to such ability, on some updates.

My scrollbar customizations in userChrome.css and userContent.css do not work any more (other CSS changes still work, for menu/addressbar/tabbar/bookmarksbar orderint and tab styling). I had to resort to settings in user.js file, to get a 20px width scrollbar, suitable for my big screen, but... it gets very wide when I increase the focus, on some webpages and becomes very ugly! Furthermore, I cannot make sense of the proper use of "ui.themedScrollbar*" settings and the scrollbar and its slider result in the same color. These are my settings in user.js:

user_pref("widget.content.gtk-theme-override", "backwater"); user_pref("widget.non-native-theme.enabled", false); // Use GTK-3.0 gtk.css: set to false user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // Use userChrome.css & userContent.css: set to true user_pref("widget.gtk.alt-theme.scrollbar_active", true); user_pref("widget.non-native-theme.scrollbar.size.override", 20); // If nothing else works, fix scrollbar width to 20px user_pref("widget.non-native-theme.gtk.scrollbar.round-thumb", false); user_pref("widget.non-native-theme.gtk.scrollbar.thumb-size", 1.0); // originally 0.75 user_pref("widget.non-native-theme.gtk.scrollbar.allow-buttons", true); // it was true, anyway... user_pref("layout.css.cached-scrollbar-styles.enabled", false); user_pref("layout.css.color-mix.enabled", true); user_pref("widget.non-native-theme.scrollbar.style", 4); // wide scrollbar theme: set to 4 user_pref("ui.themedScrollbar", "#bad1f5"); user_pref("ui.themedScrollbarInactive", "#668cc4"); user_pref("ui.themedScrollbarThumb", "#e4e4e4"); user_pref("ui.themedScrollbarThumbHover", "#e4e4e4"); user_pref("ui.themedScrollbarThumbActive", "#668cc4"); user_pref("ui.themedScrollbarThumbInactive", "#bad1f5"); user_pref("browser.dom.window.dump.enabled", false); user_pref("extensions.ui.sitepermission.hidden", false); user_pref("fission.experiment.max-origins.qualified", true);

Either with the "ui.themedScrollbar*" settings or without them (and cleared from the prefs.js file), the scrollbar and its slider result in the same color, unless I (tryingly) click on some place on the scrollbar outside its slider; then I can see the slider, _only_ for the duration of the mouse-down event (which causes up or down page-hight scrolling).

The default, very thin scrollbar, as well as my modified wide scrollbar with invisible slider are both useless to me! I have even tried fx-autoconfig (https://github.com/MrOtherGuy/fx-autoconfig) to make the scrollbar CSS work, but no result. At this point, I am considering switching to another browser, despite the trust I have to mozilla, for my data and privacy.

My preferences > general > files & attachments settings all show "use LibreOffice Writer" (free Word substitute, interchangeable with Word). Instead i get a full-screen "reply" template (presumably to be used to reply to the email --not at all what i want!

There is no userChrome.css in my profile.

If it needs to be created, where do I create it?

Yes, I searched for help. What I found was about userChrome.css to solve specific problems, but not what to do if it doesn't exist. Is userChrome still supported?

Thank you! Mark.

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

Hello!

I have been using this userChrome.css code to hide the tab bar if there is only one tab (on Windows):

tab:only-of-type, tab:only-of-type + #tabs-newtab-button {

   display: none !important;

}

#tabbrowser-tabs, #tabbrowser-arrowscrollbox, #tabbrowser-tabs > .tabbrowser-arrowscrollbox {
   min-height: 0 !important;

}

Since one of the recent Firefox updates, this code does no longer work. Maybe because there is a new element in the tab bar: A drop-down list at the right.

Any idea how to make the above code work again?

Peter