Prevent installation of incompatible extensions

[Spitfireap]

Fixes part of #526

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.46%. Comparing base (e7995ad) to head (6f2ed24).
Report is 25 commits behind head on master.

❗ Current head 6f2ed24 differs from pull request most recent head c069f7e. Consider uploading reports for the commit c069f7e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #533      +/-   ##
==========================================
+ Coverage   54.40%   54.46%   +0.05%     
==========================================
  Files          10       10              
  Lines         761      762       +1     
==========================================
+ Hits          414      415       +1     
  Misses        347      347              

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