Extensions will now be given the previous URL for the tab, which can be verified by bookmarking it (without activating it first). Let the tab finish loading, load a different URL in the tab, and then discard the tab with an extension. To reproduce the bug, select a discarded tab that was created by a 'Restore previous session', created as a new discarded tab by an extension, or that was already discarded by an extension (like Auto Tab Discard). (Bug fixed in Firefox 88) There is a Firefox bug where an extension may be given the wrong URL for a tab after the tab is discarded by an extension. A shift middle click on a bookmark folder will open all the bookmarks in the background. By default, this tab is not added to the line. When a bookmark folder is middle clicked, the first bookmark in the folder is loaded into an active tab. Firefox starts to become unusable on an average computer, when pushing it too much further than that. It is not recommended to open more than 1000 non discarded background tabs all at once. This means commands like 'Add discarded tabs' will not work correctly in this situation, until the bug is fixed. If _pinned_tabs_on_demand is set to true in the about:config page, Firefox will not show pinned tabs as discarded tabs to an extension after a Firefox restart. Enabling the option 'Add new tabs to the line that are created as active tabs.' is necessary to add these tabs to the line and then block them. Focus will end up on the last tab created, usually the rightmost tab. When creating multiple tabs at once, some extensions will create them all as active tabs. Tabs with restricted sites like and can't be blocked from loading by this extension. The option 'Make new background tabs session proof' will preserve the tab titles. The title of a blocked tab that is recovered after a previous session is restored is 'New Tab' in Firefox 67+ (the title used to be blank). Please select the 'Make new background tabs session proof' option, if this is a concern. The conflict happens when a blocked background tabs hostname is a match under Temporary Containers 'Per Domain Isolation'.īlocked tabs that are removed from the line before they have loaded can't be added back to the line if the extension is turned off or Firefox is restarted. These are extensions that block a new background tab from loading until it is selected. HoldTab, LoadTabOnSelect, LoadTabOnSelect Evolution, and LoadTabOnSelect 3. Otherwise, a shift middle click must be used. If that setting is changed to true, a mouse middle click will open a bookmark in a new tab in the background.
false (default): Load the tab in the foreground.(Control behavior of new tabs opened from bookmarks and history.).A preference to reverse that behavior is in the about:config page: A bookmark opened in a new tab is not loaded in the background by default. Otherwise, a shift middle click can be used to create a background tab. If 'When you open a link in a new tab, switch to it immediately' is unselected in Firefox's Option page, a mouse middle click on a web page link will create a new tab in the background. Various commands or settings for the extension can be accessed in the toolbar button popup or in its Options page. They will be ignored and the extension will work around them.
Tabs with these URLs may get stuck in the line. Some URLs may not be viewable by an extension, like URLs that launch applications. An exception is a moz-extension URL that belongs to this extension. Tabs with URLs that can't be blocked and that were added to the line will quickly be removed when the URL is viewable. In many cases, the URL to be loaded in a new tab can't be viewed by this extension when the tab is created and added to the line. Only tabs with http or https URLs can be blocked from loading by this extension. It also helps users that open many background tabs at once by not overwhelming their browser or CPU. This extension was designed for users with slow internet connections that routinely open multiple background tabs at the same time. The first blocked tab in the line is then allowed to load. A tab is removed from the line once it has finished loading. Load Background Tabs Lazily places newly created background tabs in a line and allows only a specific number to load, while blocking the rest. This extension tries to duplicate some of the behavior of Load Tabs Progressively, an addon that has not been updated to work with newer versions of Firefox.
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