As Firefox introduces changes in order to appeal new users, some current users might prefer the prior behaviors. Here is a selection of changed features and how to undo / work around them.
88.0 : “View Image” is replaced by “Open Image in New Tab”
Viewing a selected image in the same tab has been removed.
You now need to use an add-on such as View Image Context Menu Item.
In the preferences, in General > Applications, change the action for the given content types.
Since 101.0: a setting right below the known content type list now allows to chose the default action for unknown content types.
Since 102.0: In order to use the system temporary folder when opening files, instead of the download folder, change browser.download.start_downloads_in_tmp_dir to true in about:config.
109.0 : Extensions button cannot be managed like other toolbar buttons
In about:config, change extensions.unifiedExtensions.enabled to false, then restart Firefox. This option was removed in version 111.0.
131.0: You can not completely disable the hovering tab preview bubble
You can disable the image preview when hovering a tab from the General Settings.
You can alternatively set browser.tabs.hoverPreview.enabled to false in about:config
You can disable completely the preview bubble (Title+URL preview) by setting browser.tabs.hoverPreview.enabled to false in about:config.
You can disable the image preview when hovering a tab from the Settings, but you can NOT disable the Title+URL preview bubble from the Settings, you need to do it from about:config. Set the following to FALSE (setting only the first one actually works, the second is only for the image preview you can disable from the Settings):
I don’t know if it has hit FF stable yet, but it has been in FF Nightly for at least a few weeks now. There is no about:config setting to remove the “All Tabs” button in Tab bar. I won’t see it in Stable which I use rarely because I already have the modification in userChrome.css for that profile as well.
I have the unified extension modification here as well:
#unified-extensions-button {
display: none !important;
}
/* Hide "All Tabs" button when the tab bar isn't overflowing */
#tabbrowser-tabs:not([overflow="true"]) ~ #alltabs-button {
display: none !important;
}
Yes they decided to remove the ability to hide this button because " There’s likely a small but opinionated minority of users who had set this pref to false" (speaking about browser.tabs.tabmanager.enabled = false) 1916622 - Remove the browser.tabs.tabmanager.enabled pref
Also I don’t think your CSS is “correct” for the current situation, there is no overflowing anymore they removed that, it is always on now as per the latest changes. Just now need:
New in Firefox Nightly 134: Address Bar Updates (search)
To revert to the old style, just start typing and your choices appear rather than the new dropdown style:
In about config:
set browser.urlbar.scotchBonnet.enableOverride to false
You can vote to revert the feature there: https://connect.mozilla.org/t5/ideas/firefox-bring-back-quot-view-image-quot/idi-p/2688
Since 101.0: a setting right below the known content type list now allows to chose the default action for unknown content types.