Diễn đàn hỗ trợ Firefox

I have open half a dozen or so tabs related to one subject. I would like to put them all into one "super tab", such that only the super tab shows as an open tab. Then, by clicking on that tab, it would show the tabs within it, any one or more of which could be selected. Is this possible, and if so how is it done? Perhaps there's an add-on or extension that would do this.

I have already created a multi-tab bookmark that sorta, maybe accomplishes the same thing. But it's not as convenient as what I envision as described above.

Thanks for any advice or words of wisdom.

HERE IS THE ANSWER Here is the answer to get TABS BELOW with Firefox V90 . . copy all of this code below the broken line into your - userChrome.css - file and save it. You can modify the 45px in this line if you wish to get an appropriate height . . just experiment with different numbers till you get it right --menubar-height: 45px; /*30px|41px=11px; caption buttons on menubar*/

Also to make the tabs wider or narrower, modify the line which is coded width: 50vw !important;

Finally you must enable - css - in Firefox, by typing about:config into your address bar, and search for toolkit. When all the toolkit options appear change the one which says toolkit.legacyUserProfileCustomizations.stylesheets to TRUE by click the icon in the right hand column. Than close Firefox and reopen, and check how it looks This will enable your - css - file to be read, and interpreted and accepted by the Firefox browser.

-------------------------------------------------------------------

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

/* TABS: bottom - Firefox 65 and later - updated for 89+ */
/* https://searchfox.org/mozilla-release/source/browser/themes/shared/tabs.inc.css */
/* https://raw.githubusercontent.com/Aris-t2/CustomCSSforFx/master/classic/css/tabs/tabs_below_navigation_toolbar_fx89.css */
/* https://developer.mozilla.org/en-US/docs/Tools/Browser_Toolbox */

/* ROOT - VARS */
/* you can adjust the CSS variables until it looks correct */
/* you can use the Browser Toolbox to get the toolbar heights */

*|*:root {
  --tab-toolbar-navbar-overlap: 0px !important;

  --tab-min-height: 40px !important;
  --tab-min-width:  60px !important;

  --tab-adjust:  0px; /* adjust tab bar - only for 68-73 */
  --tab-caption: 5px; /* caption buttons on tab bar */
}

/* TAB BAR - below nav-bar */
#navigator-toolbox toolbar:not(#nav-bar):not(#toolbar-menubar) {-moz-box-ordinal-group:10 !important;}
#TabsToolbar {-moz-box-ordinal-group:1000 !important;}

#TabsToolbar {
  display: block !important;
  position: absolute !important;
  bottom: 0 !important;
  width: 50vw !important;
}

#tabbrowser-tabs {
  width: 100vw !important;
}

/* navigator-toolbox - PADDING */
*|*:root:not([chromehidden*="toolbar"]) #navigator-toolbox {
  position: relative !important; /*89+*/
  padding-bottom: calc(var(--tab-min-height) + 1px) !important; /*ADJUST*/
  background-color: var(--toolbar-bgcolor) !important;
}

/* TabsToolbar with menubar and titlebar hidden - rules for Firefox 65-73 */
*|*:root[tabsintitlebar]:not([inFullscreen="true"]):not([sizemode="maximized"]) #toolbar-menubar[autohide="true"] ~
 #TabsToolbar{
  bottom: var(--tab-adjust); /*ADJUST*/
}

/* TABS: height */
#tabbrowser-tabs,
#tabbrowser-tabs > .tabbrowser-arrowscrollbox,
.tabbrowser-tabs[positionpinnedtabs] > .tabbrowser-tab[pinned] {
  min-height: var(--tab-min-height) !important;
  max-height: var(--tab-min-height) !important;
}

#TabsToolbar {
  height: var(--tab-min-height) !important;
  margin-bottom: 1px !important;
  box-shadow: ThreeDShadow 0 -1px inset, -moz-dialog 0 1px !important; /*OPTIONAL*/
  background-color: var(--toolbar-bgcolor) !important;
  color:            var(--toolbar-color) !important;
/*  z-index: 1 !important; */
}

/* indicators *//*
*|*:root[privatebrowsingmode=temporary] .private-browsing-indicator {
  position: absolute !important;
  display: block !important;
  right: 0px !important;
  bottom: 0px !important;
  width: 14px !important;
  pointer-events: none !important;
}
*/
.private-browsing-indicator {display: none !important;}
.accessibility-indicator    {display: none !important;}

/* Indicators - HIDE *//*
*|*:root:not([accessibilitymode])             .accessibility-indicator    {display: none !important}
*|*:root:not([privatebrowsingmode=temporary]) .private-browsing-indicator {display: none !important}
*/

/* Drag Space */
.titlebar-spacer[type="pre-tabs"],
.titlebar-spacer[type="post-tabs"] {
  width: 20px !important;
}

/* Override vertical shifts when moving a tab */
#navigator-toolbox[movingtab] > #titlebar > #TabsToolbar {
  padding-bottom: unset !important;
}

#navigator-toolbox[movingtab] #tabbrowser-tabs {
  padding-bottom: unset !important;
  margin-bottom: unset !important;
}

#navigator-toolbox[movingtab] > #nav-bar {
  margin-top: unset !important;
}

/* Hide window-controls and caption buttons on Tab Bar */
#TabsToolbar #window-controls {display: none !important;}
#TabsToolbar .titlebar-buttonbox-container {display: none !important;}

I run FF on both a Windows machine and a MacBook Pro. On the MBP the browser does not save my tabs, despite "restore previous session" being selected. I do not have this problem on the Windows machine.

I have tried uninstalling and reinstalling the browser but it has not made a difference.

I'm running the latest version of the browser and the OS is Big Sur.

I've recently updated to 92.0.1 and I've noticed that when I download a PDF attachment or file that firefox opens in a new tab rather than using the default adobe program. I've looked at settings and applications and changed to to "always ask" but I don t get any option to use adobe to open it or any other program. Also it seems to save the file in the downloads folder as a "firefox html document" and not a pdf file

Please help, I just screwed up so bad I accidentally pressed the red "close" button on Firefox on my Mac instead of the yellow "minimise" button and lost a bunch of tabs I need (they were from a while back so not in history)

There is no option to "restore previous session" or "reopen tabs" is there any way whatsoever to recover my lost tabs I am freaking out big time there was some really important stuff in there that I hadn't bookmarked yet like an absolute IDIOT!!! My session had stayed active through computer being shut down and restarted and Firefox updates but pressing the red "close" button has seemingly nuked it. Is there a way to go into folders and find the tabs? Anything please help :(

Any help appreciated, I'm desperate.

I just reinstalled my operative system, and with that my Firefox settings got reset. I know there is an entry in about:config to prevent ads from opening new tabs and pop ups without authorization, even from legit websites like the login pop-up windows when doing a sign in in Google, in those cases to allow the windows it's needed to click on the lock icon next to the URL bar and allow it from there. The problem is that I don't remember the name of that setting and I have spend an hour looking for it on Google.

In most standard Windows applications, the title bar and tab colour follows the default Windows settings, e.g. (in my case) the title bar and tab colour of active application windows is blue. This is true even in Thunderbird. Since FF 89, title bar and tabs are something between white and light gray, which is extremely user-un-friendly. FF developer team should return to the previous colour scheme. Yes, I know the circumstances of free software but this is NO excuse to alienate millions of users. Developers that change fully functionable software just, well, just to CHANGE it should consider that they are doing WRONG. Could anyone tell them? I am just user, not developer and I am not willing to learn developer tools like BugZilla just for this simple guiding principle.

I know this page recommends to open the website in a new tab, but I'd like to open it in the current tab. How may I do that?

Apologies if this is a bit limited, during typing it I ran into the issue I'm about to describe which navigated me away from this page and lost all the progress of my post as I was wrapping up :')

The issue I'm having right now is Firefox forcibly opening pages it thinks are a new site in new tabs, despite the site itself not requesting new tabs or windows. Specifically this is happening with sites between different "iterations" of itself while still being the same and having fully integrated layouts and UI.

For example: Most pages on the site have an update "https://www1" prefix, but some pages have the old "https://" only. Firefox keeps opening new tabs when navigating between these different pages despite them being the same website. I know the pages themselves are not sending new tab requests because this doesn't happen in Chrome.

So far, my "solution" has been to go through about:config to adjust the browser.link.open_newwindow value to 1 instead of 3, which forces all links to stay within the same window. This unfortunately causes a whole host of other issues though.

Because its an override, it also means any links opened from an external program (like discord) forcibly open in the last active tab, navigating away from the page. This is obnoxious and annoying in and of itself because it means to save the tabs I already have open I need to manually open a new tab in FF before clicking any link, which I never remember to do. (Goodbye post progress (': )

If that weren't bad enough, when trying to hit the back button to get to the previous page FF ends up in some sort of weird redirection loop "between" pages, where the last page will disappear but FF won't navigate to the link it was trying to open either, so its just a blank infinitely loading page with the URL of the link that was opened. The only way to stop this from happening is to navigate back 2 pages, losing the current page, before it starts the redirect loop. If the loop starts before this happens, the tab locks up and needs to be hard-refreshed with f5 or completely closed due to the weird lag it causes.

Literally all I want Firefox to do here is not assume a new tab needs to be opened just because the URL "seems" different to it. Is there ANY way to get this behavior?

With recent versions of Firefox, I haven't found how to open all tabs from another synced computer. They use to be displayed in bookmarks or history lateral menu and I could use the right button to open all. If this option has been removed, I don't understand why going steps back.

Dear Mozilla/Firefox,

I've been using Firefox over the last couple of months/years but I just can't get the restore recently closed tab shortcut (CTRL+SHIFT+T) to work on my windows PC.

Here's a (Loom) recording of me showing that Firefox does correctly track the history of closed tabs and that I can click on them to restore but the shortcut (which is also mentioned as CTRL+SHIFT+T) just won't work: https://www.loom.com/share/7048894683654dccb4926aa4dd09e6a6

What I've tried so far: - Check if the history is actively collected - No I'm not using private browsing - I've read another support thread to check "about:config" and in there check that "browser.sessionstore.max_tabs_undo" is set (in my case it's the default 25) - Disabling all extensions (which I don't think are any suspicious or weird ones but disabled just to check - see attached image) - Resetting Firefox through the windows uninstaller - Fully uninstalling (using Revo Uninstaller with advanced check) and reinstalling Firefox

Please help me because I'm about to quit Firefox for such often used feature just not working...

P.S. it's working perfectly on my Macbook and I'm running the latest 96.0.1 64bit version

Hi! With the latest update to Firefox, the tab height is now taking up too much of my vertical screen space and the option to make them compact seems to be gone from where it used to be in the settings. I've tried to search for an extension to fix this, but haven't managed to find one. What do you all suggest I do?

(I don't want to use Chrome. It takes so much RAM that I can't really run both Chrome & Discord at the same time, let alone anything else with it.)

Thank you!

Hi

I had two Firefox windows open. One with 100+ tabs and the other with 1 tab. I closed the Firefox with 100 tabs, and then closed the one with 1 tab, without thinking. I then realised that I should have closed them in the opposite order, because I want the 100 tabs to get restored.

I opened Firefox again and was dismayed to see just the single tab get restored. I did some searching and backed up the "sessionstore-backups" folder.

I then tried to close Firefox and replace sessionstore.jsonlz4 with previous.jsonlz4 from the backed up "sessionstore-backups" folder. This did not work, as when I opened Firefox I still only got the 1 tab back and "recently closed windows" remains grayed out. Ctrl+Shift+N does nothing as well.

I used https://www.jeffersonscher.com/ffu/scrounger.html to inspect the backed up previous.jsonlz4 file and it shows

Open Windows Open Window 1 Tab 1 [...]

Closed Windows Closed Window 1 Tab 1 [...] [...] Tab 125 [...]

So the previous.jsonlz4 file does contain my mistakenly closed window but I can't get Firefox to restore the tabs!

Can anyone please help me get my tabs back? I'm on Firefox v96.0.1.

Last time Firefox updated, I managed to find information online about moving the website tabs so they were below the bookmarks instead of at the top of the screen. It was a huge pain-in-the-butt to do.

After a recent re-install, the tabs have moved themselves back to the top of the screen and nothing I do seems to be able to move them back below the bookmarks.

Is there a way I can move the tabs that doesn't involve spending hours hunting through posts on the web, changing hidden Firefox settings, and recoding .css files?

If not, why do you not give the option to move the tabs wherever the user wants? Especially when it makes far more sense to have the website tabs directly above the website being viewed, at least in my opinion?

I'm currently using Firefox 85.0.2 (64-bit).

Hi,

I always have dozens of tabs opened, if not hundreds. They have vanished. I’ve been trying to follow the topics on the matter, such as the one named ‘Session won't load’ (questions/1254740), to no avail.

Finally, this time I remembered not to close Firefox when I saw my tabs where suddenly missing. I’ve never seen the ‘Restore the previous session’ on the Firefox menu, and neither did I this time. Without closing the browser, I did a backup of the ‘sessionstore-backups’ folder. It contains:

‘previous.jsonlz4’, from 22/11/2020 17:42 ‘recovery.baklz4’, from 22/11/2020 18:57 ‘recovery.jsonlz4’ from 22/11/2020 18:58 ‘upgrade.jsonlz4-20201027185343’ from 31/10/2020 13:42 ‘upgrade.jsonlz4-20201108180448’ from 10/11/2020 15:05 ‘upgrade.jsonlz4-20201112153044’ from 22/11/2020 10:34

The one I need is ‘previous.jsonlz4’, since by 18:57 I’ve already lost my tabs. From the update backups I think I could also use the one from 22/11. In any case, I don’t understand what I am doing wrong so as to recover the ‘previous.jsonlz4’. This is what I’ve tried from different threads on my profile folder:

The ‘-backup’ and ‘OLD’ changes belong to different attempts

- Rename (on ‘sessionstore-backups’ folder) ‘recovery.jsonlz4’ and ‘recovery.baklz4’ to ‘recovery-backup.jsonlz4’ and ‘recovery-backup.baklz4’, and also tried with ‘recoveryOLD.jsonlz4’ and ‘recoveryOLD.baklz4’ - Rename ‘sessionstore-backups’ folder to ‘sessionstore-backupsOLD’ - Rename (on the main profile folder) ‘sessionstore.jsonlz4’ file to‘sessionstore-backup.jsonlz4’, and also tried with ‘sessionstoreOLD.jsonlz4’ - Copy/paste the ‘previous.jsonlz4’ file into the main profile folder. - Rename ‘previous.jsonlz4’ to ‘sessionstore.jsonlz4’

Nothing has worked. Once followed the steps, Firefox keeps opening my startup page. Note that it does not restore my previous session (that is, some tabs regarding this same subject), but my startup page, which means my attempts are having some effect, although not the desired one. I do have the ‘Restore previous session’ checkmarked in ‘Setting/General/Startup.

I also tried to replace ‘recovery.baklz4’ (on ‘sessionstore-backups’ folder) with ‘previous.jsonlz4’, from 22/11/2020 17:42, hoping to be prompted with the ‘Well, this is embarrassing’ + ’Restore’ window. I had no success.

I’ve been trying to recover my tabs for hour by now and don’t find what I am doing wrong. Why does Firefox refuse to load my ‘previous.jsonlz4’ file? Am I missing something? Maybe ‘previous.jsonlz4’ is corrupted or something? Should I try to use the ‘upgrade.jsonlz4-20201112153044’ from 22/11/2020 10:34 file? (Although I would lose some information)

Some people talk about a ‘History > Restore Previous Session’. I cannot find anything similar.

Thank you very much

So after wiping my system for a fresh windows install, I pulled out the backup.json4 and recovery.json4 from my backup drive and plopped it in place of sessionstore.json4

And all of my tabs and windows came back! So far so good!

But then after closing some tabs and moving things around, when I close the session out again, it doesn't update the sessionstore file, or any of the stuff in the backup folder to reflect those changes.

When I open firefox again it starts as a session with all my windows/tabs after the file-replace.

I use firefox for managing tutorial videos, which involves separating them into different windows/tab arrangements, so any tips on how to resolve this issue and get firefox to start updating the sessionstore would be appreciated.

Thank you!

I have once again lost all my pinned tabs. The answers to this I'm seeing are random and unstructured. This is becoming an issue for me as I use this function frequently. Can the Mozilla team PLEASE fix this properly as it appears to mess up a few folks. And the answer is NOT having to quit and restart. They should be presevered in their own right. And please can you implement synching of Pinned Tabs across my login domain. Ta muchly

I just recently upgraded to Firefox 87.0 (64-bit) for Windows 7. Before the upgrade if I wheel clicked on a link it would open up in a new tab. Now it does absolutely nothing. I've even tried holding the wheel click for 10 seconds, still nothing.

I have verified the following settings in about:config; browser.tabs.opentabfor.middleclick=true middlemouse.contentLoadURL=false middlemouse.paste=false middlemouse.scrollbarPosition=false

When I was doing a search for related questions to this problem I found a user 3 years ago had a similar problem, and that they had an addition setting: middlemouse.openNewWindow=true. This setting no longer seems to be there. I have no idea if this setting was recently removed, and is the source of my problem, or if it was removed a while ago and my problem is the result of some other change. I have restarted Firefox twice, and even rebooted my laptop, in an effort to fix this problem. Nothing has worked. Depending on what I am doing I rely on using the wheel click HEAVILY, as it is much simpler to close a tab then to hit the back button 4, 10, or 20 times to return to where I started, or if I'm trying to keep track of what links I've followed from doing a search without having to re-do the search and hope I get the exact same results (with Google I never do).

At this time I am already heavily inclined to just return to the previous version of Firefox, despite how much of a pain that will be, however this is a recently released update, so I feel I should give the devs a chance to fix any new bugs from the update. That, and I won't have the time around work for several days, probably over a week, which makes it more practical to give the devs a chance to release a patch that fixes the problem.

So for starters I am fully aware of the "When you open a link, image or media in a new tab, switch to it immediately" setting, it is turned off.

What I want to do is be able to open new tabs from my bookmarks bar without immediately switching to them. Regardless of middle mouse click or right click and open new tab. Considering the mentioned setting is turned off I would assume that would solve the problem but it hasn't. It has however made it so when I'm browsing or looking through search engine results it doesn't open a new tab right away. But when I have a home/new tab open and am opening tabs from my bookmarks bar, it unfortunately switches to the new tab immediately. I have had this working on a previous install but am stumped as how to replicate.

Any help appreciated, thank you!

hi

what code i need to put in userChrome.css to hide horizontal scroll bar in firefox but not the vertical one? also its any way to make skinnier the vertical scrollbar?

ty