speedup by Elad Karako

discard non-active, non-auditable tabs. CSS to reduce rendering quality. JS to set lazy loading and no preloading of media.

Experimental

Available on Firefox for Android™

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About this extension

a tiny web-extension, still in early development,
designed to reduce RAM and CPU consumptions by background tabs,
as well as to provide a reactive and speedy web-pages for the tab you are currently using.

there are no magic tricks,
just discarding tabs, CSS rendering that makes things slightly uglier (but a lot faster), and some trying of native lazy loading.

almost 15 years after publishing my last web-extension in Mozilla! ☺
please visit the github page for more details and code-review or opening issues.

https://github.com/eladkarako/webextension-speedup

Developer comments

items below were all fixed in version 26.6.25.

tab discard can be somewhat annoying when you try to switch back and forth from two recent tabs, clicking on a discarded tab will bring it up, or restore it, but it often also refreshes it. I will adjust the limitation to reduce the chance of requesting discarding the most N recent tabs. but as we workaround, moving a tab to a new window helps with switching faster.

as for CSS and JavaScript injection (content-scripts),
both are rather simple and should probably work fine on most websites.

please feel free to open an issue to detail your browser benchmark in the github page.

it should be supported on most older Firefox version, but I limited it to current ESR for TOR, which is 140.0 (June 24th, 2026).

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speedup by Elad Karako

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