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Max Tabs Extension

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I've downloaded the Max Tabs Extension, but; can not get it to function. I appears under the extensions list and is grayed out.

I would like to limit the number of processes running during a Firefox session. Task Manager shows 7 Processes running when only one tab is open.

Am I missing something here. It seems to be loading down my PC.

I've downloaded the Max Tabs Extension, but; can not get it to function. I appears under the extensions list and is grayed out. I would like to limit the number of processes running during a Firefox session. Task Manager shows 7 Processes running when only one tab is open. Am I missing something here. It seems to be loading down my PC.

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Hi, is it this one? https://addons.mozilla.org/firefox/addon/max-tabs-web-ext/

I think it should have a toolbar button, but if it's grayed, maybe not. Does the gear button allow pinning it to the toolbar?

There isn't a direct connection between tabs and processes. Some processes are global to Firefox. You can see which processes are used for which parts of Firefox by opening the built-in Task Manager: Shift+Esc or type/paste about:processes in the address bar and press Enter to open that list.