Whatever you experienced is very unlikely to be caused by this add-on. The add-on only initializes if you manually dig into about:config and enable `extensions.

Whatever you experienced is very unlikely to be caused by this add-on. The add-on only initializes if you manually dig into about:config and enable `extensions.pug.lookingglass`. Otherwise, it just starts up once at browser launch, checks that preference, and shuts itself down. (https://github.com/gregglind/addon-wr/blob/59659431fd2a75c33ac70a0e6e3e193a01ff8f66/addon/bootstrap.js#L22-L24 https://github.com/gregglind/addon-wr/blob/59659431fd2a75c33...) If you're able to consistently reproduce the issue, please let me know.