Loaded Tabs Limiter од Shajirr

This addon keeps the number of currently loaded tabs below a specified limit, preventing a situation when there are too many loaded tabs eating RAM for no reason.

Usage instructions

• Clicking the addon icon toggles the addon's active/disabled state.
• To quickly open the Options menu, right click the addon icon -> "Options"
• Addon icon show the number of currently loaded tabs, background color changes depending on how close it is to the limit
• You can mark a tab as persistent, so that it won't be unloaded by this addon - activate said tab, then right click anywhere on the page background -> "Make this tab persistent"

Options

• Loaded Tabs Limit - how many tabs can be in the loaded state max
• Unload pinned tabs - if enabled, pinned tabs will be unloaded too, by default they are skipped
• Count persistent tabs towards limit - by default, persistent tabs are not counted, so you can have a max number of regular loaded tabs as defined in the "Loaded Tabs Limit" plus any number of persistent tabs. With this option enabled, persistent tabs are counted towards the "Loaded Tabs Limit" too
• Enable timer-based unloading - will automatically discard tabs after the set tab inactivity timeout
• Tab Inactivity Timeout - the amount of time before an inactive tab is discarded
• Check Interval - how often the extension checks for inactive tabs. If your timeout is high, you can increase this interval to reduce the number of checks performed

KB Shortcuts

• Discard current tab
• Discard other tabs in current group
• Discard other tabs in current container
• Discard other tabs in this window
• Discard tabs in other windows
• Discard all other tabs

Shortcuts need to be set in the "Manage Extension Shortcuts" menu, which you can activate after clicking the gear icon on "about:addons" page.