Rated 5 out of 5 stars

Buscador totalmente adaptable a tus preferencias personales.
Mientras estás navegando solo tienes que seleccionar la palabra (con un doble click) o palabras que quieras buscar y aparece un menú con los buscadores, diccionarios o traductores que tu hayas escogido.
También puedes elegir copiar la selección, copiarla como texto plano, resaltarla, etc. Estas opciones, al igual que los buscadores o diccionarios los puedes adaptar a tus gustos.
Para mí es un complemento imprescindible.
Además ahora con un solo click sobre la barra de herramientas puedes activar o desactivar este complemento.

This review is for a previous version of the add-on (0.61). 

Rated 4 out of 5 stars

OK

This review is for a previous version of the add-on (0.5). 

Great Add-on! Rated 5 out of 5 stars

Edit: Updated to five stars with recent updates.

Nice to see this add-on updated for WebExtensions. Even as a work-in-progress, it's a convenient and useful add-on. Due to the limitations of WebExtensions, it is a bit more complicated to set up the necessary bookmarks as you can't just import your existing search engines, but that also gives the user a bit more flexibility in organizing the search options. Perhaps the developer can create an bookmark import feature and host a repository of bookmarks with user contributions.

The biggest annoyance right now is that the pop-up isn't yet aware of its position in the browser window, which means the pop-up can often appear outside to the right or below the current window. I do expect that will get fixed in future versions. (It was!)

Also, the developer's comments notwithstanding, the add-on CAN be used on add-ons.mozilla.org, but you have to add a new boolean — privacy.resistFingerprinting.block_mozAddonManager — to about:config in FF 57 and set its value to true. I find this particularly helpful for translating add-on reviews.

This review is for a previous version of the add-on (0.4). 

Popup up is in position last two versions. Also there are number of improvement, now functionality is similar to old SelectionSK.

Rated 4 out of 5 stars

Хорошее расширение, но хотелось бы иметь возможность, чтобы открывалось не меню, а иконки над выделением, с возможностью выбора иконок. Мне на даный момент нужно Копировать, Искать, Перевести. Проблема в том, что когда я выделяю слово с правой стороны экрана, меню воторого уровня уже не помещается на экран и нужно уже двигать стрелочками клавиатуры влево, чтобы меню второго уровня стало видимым.

This review is for a previous version of the add-on (0.2). 

Try version 0.7 - panel mode added.

Pretty and handy Rated 5 out of 5 stars

This add-on looks pretty and is handy. The 'copy' functions are ok. The 'search' and 'translate' work with bookmarks. You can fully adapt this to your own wishes. Once you finish this job, you have a permanent, excellent search and translate tool.

This review is for a previous version of the add-on (0.2).