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Testing Plugin and extension compatibility BEFORE upgrading Firefox

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Is there a way to test the compatibility of all of my plugins, extensions, add-ons BEFORE upgrading to a new version of Firefox? If not, when will one be created?

Is there a way to test the compatibility of all of my plugins, extensions, add-ons BEFORE upgrading to a new version of Firefox? If not, when will one be created?

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No but you can go manually to addon homepage and there in version information you can find about addon compatibility like 8.* 7.*...

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You can check compatibility here, for the most popular add-ons.
https://addons.mozilla.org/en-US/firefox/compatibility/report

There's also this extension which you can install. - Is It Compatible?
https://addons.mozilla.org/en-US/firefox/addon/is-it-compatible