Many site issues can be caused by corrupt cookies or cache.

• Clear the Cache and

• Remove Cookies

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

Type about:preferences<enter> in the address bar.

• Cookies; Select Privacy. Under History, select

Firefox will Use Custom Settings. Press the button on the right side called Show Cookies. Use the search bar to look for the site. Note; There may be more than one entry. Remove All of them.

• Cache; Select Advanced > Network. Across from

Cached Web Content, Press Clear Now.

If there is still a problem, Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.,) and then perform these steps:

In Firefox 54 and below:

1. Click the menu button and select Options (Windows) or Preferences (Mac, Linux).
2. Select the Advanced panel and the General tab.
3. Uncheck Use hardware acceleration when available.
4. Close Firefox completely and then restart Firefox to see if the problem persists.

In Firefox 55 and above:

1. Click the menu button and select Options (Windows) or Preferences (Mac, Linux).
2. Select the General panel.
3. Under Performance, uncheck Use recommended performance settings. Additional settings will be displayed.

   

4. Uncheck Use hardware acceleration when available.
5. Close Firefox completely and then restart Firefox to see if the problem persists.

Did this fix your problems? Please report back to us!

If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

• Upgrade your graphics drivers to use hardware acceleration and WebGL

This problem is still persist. I have cleared cache and history too, hardware acceleration is switched off, but space line in gmail main page is still too big.

Mouse to this line, hold down the left mouse and move it left/right.

FredMcD said

Mouse to this line, hold down the left mouse and move it left/right.

Sorry, but I don´t understand your advice - When i put mouse cursor on line and then I hold left mouse button, whole line are moving together with mouse cursor. It has no effect to space line ....

martin.gecik said

FredMcD said

Mouse to this line, hold down the left mouse and move it left/right.

Sorry, but I don´t understand your advice - When i put mouse cursor on line and then I hold left mouse button, whole line are moving together with mouse cursor. It has no effect to space line ....

Sorry, not whole line is moving, only small window with text "Move 1 conversation" appear ...

Hmm. Contact Gmail and ask about it.

FredMcD povedal(a)

Hmm. Contact Gmail and ask about it.

Fred, it isn't problem of gmail. Please see again screenshot from my PC - I have opened gmail in the same moment in two different browsers - Chrome on left side and Firefox on right side. You can see that spaceline in Firefox isn't the same as in Chrome. The same situation as in Chrome is also in Opera and MS Edge. I can say that gmail has correct spaceline in all browers except Firefofox. This problem with spaceline is relative new, I noticed it only few day ago. What happens in Firefox last few day? Maybe developers did some changes, wich have impact to spacelines. I remember similar situation, regarding with spaceline in Bookmars window few month ago. For changing space line in bookmarks area is necessary to use Stylish add-on and use some ccs style for fixing it. Maybe problem with space line in gmail main page has similar reason ...

I'm out of ideas. Sorry.

Is this between all lines including lines that automatically wrap or only when you start a new paragraph by pressing the Enter key?

It isn't problem regarding with text space line during writing e-mail. I am talking about a big distance between two messages in main gmail window. Please see again on picture above with screenshot, where is the same gmail mailbox in Chrome (left side of picture) and the same gmail mailbox in Firefox (on right side of picture)

You can click the cogwheel button in the top right corner and check the current Density setting. Try the Compact setting in case currently a larger setting is selected.

cor-el said

You can click the cogwheel button in the top right corner and check the current Density setting. Try the Compact setting in case currently a larger setting is selected.

I always use Compact setting. Try to open your gmail in Firefox and then in Chrome or Opera or Edge - has the your gmail the same look in all these browsers? Probably Yes except Firefox :(

I think that Google uses size settings in 'ex' (x-height) units for the margin. Firefox might be converting these properties different than other browsers especially when further upwards in the DOM percentages are used.

• https://developer.mozilla.org/en-US/docs/Web/CSS/length

cor-el said

I think that Google uses size settings in 'ex' (x-height) units for the margin. Firefox might be converting these properties different than other browsers especially when further upwards in the DOM percentages are used.

• https://developer.mozilla.org/en-US/docs/Web/CSS/length

Hi cor-el, When FF25 was released, many users had problem with bigger space lines in bookmarks windows. The solution for fixing this annoying behavior is to use Style extension and short script as: @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); .sidebar-placesTree treechildren::-moz-tree-row, .placesTree treechildren::-moz-tree-row {

 height: 1.3em !important;
 border-width: 1px !important;

}

Will be possible to use Style and some script for fixing space line problem in actual version FF and gmail? Is there somebody who is able to write this kind of script? I am not a developer :(