Originally born from a request of @sheppy, tabFx is a web extension made for people that keep many tabs opened and can’t find the ones they need easily. It allows you to find and access similar opened taps to the active one in a fast and smart way.
It just reached its second version and I think it’s mature enough to start being used. Here’s the link, in case someone wants to test it:
and the github repository.
I appreciate any feedback or ideas given about the extension. 
And thank you so much, MDN Staff, for all the learning material you share with us. I’m enjoying a lot the journey of web dev, because of you.
Please read the following, before installing.
New Features:
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Now settings are saved automatically in local storage.
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Ending filter improved, now you have two words lists that are considered for the process: included and ignored as you suggested. The filling of such lists is still automatic and depends of the active tab, but it can be adjusted as the next point describes.
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Settings section added. It only allows to change how the filter with the ending part of the url will behave. Choose which separator characters are going to be considered when they appear in the ending, and the same goes with the user’s typed keyword.
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Reset button to easily clear all extension settings. Characters ‘$’ and ‘.’ are considered default.
Usage Examples:
For MDN editors, in particular:
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Having default settings, if you are positioned in MDN edit tab, it will list all MDN tabs that have
$editin the ending, ignoring stuff like?src=contextamong others.
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If you add the keyword ‘$edit’, check it, and uncheck start at the main filter window. You end up having access all the time to a list of tabs with ‘$edit’ in the ending — whichever active tab you are on.
